TY  - JOUR
AU  - Milojević-Rakić, M.
AU  - Dondur, Vera
AU  - Damjanović-Vasilić, Ljiljana
AU  - Rac, Vladislav
AU  - Rakić, Vesna
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4737
AB  - The competitive adsorption of aromatic hydrocarbons (benzene, methyl- and ethyl-benzene) and water on FeZSM-5 zeolites have been investigated by means of temperature-programmed desorption coupled with mass spectrometry (TPD/MS). The incorporation of iron in zeolite was done by aqueous ion exchange using dilute solutions of Fe complexes (ferric citrate and ferrous oxalate) and ferric nitrate. Diffuse reflectance UV-Vis spectroscopy and temperature-programmed reduction (TPR) were applied to characterize active sites on investigated zeolites. The existence of different iron species on FeZSM-5 zeolites was revealed. It has been demonstrated that the activity of the Fe exchanged zeolite depends on the iron salt used for ion exchange. The isolated, dispersed ions, which are often considered to be essential for adsorption and catalysis, were obtained with high yield only by ion exchange in the presence of ferrous oxalate. TPD/MS measurements show that aromatic hydrocarbons adsorb on specific, strong active sites in hydrated zeolites. The binding occurred when organic molecules replace water previously adsorbed at the same sites. Benzene showed non-dissociative adsorption/desorption, while new mass fragments were recorded during methyl-benzene and ethyl-benzene desorption implying their dissociative adsorption/desorption on active sites in hydrated zeolites.
PB  - Springer, Dordrecht
T2  - Reaction Kinetics Mechanisms and Catalysis
T1  - The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite
EP  - 246
IS  - 1
SP  - 231
VL  - 123
DO  - 10.1007/s11144-017-1275-y
ER  - 

@article{
author = "Milojević-Rakić, M. and Dondur, Vera and Damjanović-Vasilić, Ljiljana and Rac, Vladislav and Rakić, Vesna",
year = "2018",
abstract = "The competitive adsorption of aromatic hydrocarbons (benzene, methyl- and ethyl-benzene) and water on FeZSM-5 zeolites have been investigated by means of temperature-programmed desorption coupled with mass spectrometry (TPD/MS). The incorporation of iron in zeolite was done by aqueous ion exchange using dilute solutions of Fe complexes (ferric citrate and ferrous oxalate) and ferric nitrate. Diffuse reflectance UV-Vis spectroscopy and temperature-programmed reduction (TPR) were applied to characterize active sites on investigated zeolites. The existence of different iron species on FeZSM-5 zeolites was revealed. It has been demonstrated that the activity of the Fe exchanged zeolite depends on the iron salt used for ion exchange. The isolated, dispersed ions, which are often considered to be essential for adsorption and catalysis, were obtained with high yield only by ion exchange in the presence of ferrous oxalate. TPD/MS measurements show that aromatic hydrocarbons adsorb on specific, strong active sites in hydrated zeolites. The binding occurred when organic molecules replace water previously adsorbed at the same sites. Benzene showed non-dissociative adsorption/desorption, while new mass fragments were recorded during methyl-benzene and ethyl-benzene desorption implying their dissociative adsorption/desorption on active sites in hydrated zeolites.",
publisher = "Springer, Dordrecht",
journal = "Reaction Kinetics Mechanisms and Catalysis",
title = "The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite",
pages = "246-231",
number = "1",
volume = "123",
doi = "10.1007/s11144-017-1275-y"
}

Milojević-Rakić, M., Dondur, V., Damjanović-Vasilić, L., Rac, V.,& Rakić, V.. (2018). The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite. in Reaction Kinetics Mechanisms and Catalysis
Springer, Dordrecht., 123(1), 231-246.
https://doi.org/10.1007/s11144-017-1275-y

Milojević-Rakić M, Dondur V, Damjanović-Vasilić L, Rac V, Rakić V. The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite. in Reaction Kinetics Mechanisms and Catalysis. 2018;123(1):231-246.
doi:10.1007/s11144-017-1275-y .

Milojević-Rakić, M., Dondur, Vera, Damjanović-Vasilić, Ljiljana, Rac, Vladislav, Rakić, Vesna, "The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite" in Reaction Kinetics Mechanisms and Catalysis, 123, no. 1 (2018):231-246,
https://doi.org/10.1007/s11144-017-1275-y . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Damjanović-Vasilić, Ljiljana
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4487
AB  - Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study
EP  - 1140
SP  - 1134
VL  - 423
DO  - 10.1016/j.apsusc.2017.06.269
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Damjanović-Vasilić, Ljiljana and Dondur, Vera and Auroux, Aline",
year = "2017",
abstract = "Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study",
pages = "1140-1134",
volume = "423",
doi = "10.1016/j.apsusc.2017.06.269"
}

Rac, V., Rakić, V., Damjanović-Vasilić, L., Dondur, V.,& Auroux, A.. (2017). Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science
Elsevier, Amsterdam., 423, 1134-1140.
https://doi.org/10.1016/j.apsusc.2017.06.269

Rac V, Rakić V, Damjanović-Vasilić L, Dondur V, Auroux A. Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science. 2017;423:1134-1140.
doi:10.1016/j.apsusc.2017.06.269 .

Rac, Vladislav, Rakić, Vesna, Damjanović-Vasilić, Ljiljana, Dondur, Vera, Auroux, Aline, "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study" in Applied Surface Science, 423 (2017):1134-1140,
https://doi.org/10.1016/j.apsusc.2017.06.269 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2397
AB  - The present work is focused on the adsorption of nicotine from aqueous solutions. Based on the data available in the literature, serious concern is claimed regarding the appearance of nicotine in ground, surface and municipal wastewaters. In order to investigate the possibility of abatement by adsorption, three different types of zeolites (BEA, MFI and HEU) have been applied as adsorbents. In addition, the adsorption was per-formed on activated carbon, a solid customarily used for removal of pollutants from water. The adsorption of nicotine was studied by isothermal microcalorimetry, which provided the heats evolved as a result of adsorption. The values of these heats revealed that the investigated solids are energetically heterogeneous for the adsorption of nicotine from aqueous solution. Additionally, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms. The obtained adsorption isotherms were interpreted using Langmuir, Freundlich, and Sips equations; the latter was found to express high level of agreement with experimental data of nicotine adsorption on the investigated solids. The possibilities to regenerate the adsorbents were examined by means of thermogravimetry coupled with mass spectrometry. From all obtained results, it was possible to distinguish zeolite BEA as a material which possesses the capacity for adsorption of nicotine comparable to that of activated carbon.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Water Research
T1  - The adsorption of nicotine from aqueous solutions on different zeolite structures
EP  - 2057
IS  - 6
SP  - 2047
VL  - 44
DO  - 10.1016/j.watres.2009.12.019
ER  - 

@article{
author = "Rakić, Vesna and Damjanović, Ljiljana and Rac, Vladislav and Stošić, Dušan and Dondur, Vera and Auroux, Aline",
year = "2010",
abstract = "The present work is focused on the adsorption of nicotine from aqueous solutions. Based on the data available in the literature, serious concern is claimed regarding the appearance of nicotine in ground, surface and municipal wastewaters. In order to investigate the possibility of abatement by adsorption, three different types of zeolites (BEA, MFI and HEU) have been applied as adsorbents. In addition, the adsorption was per-formed on activated carbon, a solid customarily used for removal of pollutants from water. The adsorption of nicotine was studied by isothermal microcalorimetry, which provided the heats evolved as a result of adsorption. The values of these heats revealed that the investigated solids are energetically heterogeneous for the adsorption of nicotine from aqueous solution. Additionally, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms. The obtained adsorption isotherms were interpreted using Langmuir, Freundlich, and Sips equations; the latter was found to express high level of agreement with experimental data of nicotine adsorption on the investigated solids. The possibilities to regenerate the adsorbents were examined by means of thermogravimetry coupled with mass spectrometry. From all obtained results, it was possible to distinguish zeolite BEA as a material which possesses the capacity for adsorption of nicotine comparable to that of activated carbon.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Water Research",
title = "The adsorption of nicotine from aqueous solutions on different zeolite structures",
pages = "2057-2047",
number = "6",
volume = "44",
doi = "10.1016/j.watres.2009.12.019"
}

Rakić, V., Damjanović, L., Rac, V., Stošić, D., Dondur, V.,& Auroux, A.. (2010). The adsorption of nicotine from aqueous solutions on different zeolite structures. in Water Research
Pergamon-Elsevier Science Ltd, Oxford., 44(6), 2047-2057.
https://doi.org/10.1016/j.watres.2009.12.019

Rakić V, Damjanović L, Rac V, Stošić D, Dondur V, Auroux A. The adsorption of nicotine from aqueous solutions on different zeolite structures. in Water Research. 2010;44(6):2047-2057.
doi:10.1016/j.watres.2009.12.019 .

Rakić, Vesna, Damjanović, Ljiljana, Rac, Vladislav, Stošić, Dušan, Dondur, Vera, Auroux, Aline, "The adsorption of nicotine from aqueous solutions on different zeolite structures" in Water Research, 44, no. 6 (2010):2047-2057,
https://doi.org/10.1016/j.watres.2009.12.019 . .

TY  - JOUR
AU  - Petrović, S.
AU  - Terlecki-Bariević, A.
AU  - Karanović, Lj.
AU  - Kirilov-Stefanov, P.
AU  - Zdujić, M.
AU  - Dondur, Vera
AU  - Paneva, D.
AU  - Mitov, I.
AU  - Rakić, Vesna
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1815
AB  - Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  lt  MF series  lt  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.
PB  - Elsevier, Amsterdam
T2  - Applied Catalysis B-Environmental
T1  - LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation
EP  - 198
IS  - 2
SP  - 186
VL  - 79
DO  - 10.1016/j.apcatb.2007.10.022
ER  - 

@article{
author = "Petrović, S. and Terlecki-Bariević, A. and Karanović, Lj. and Kirilov-Stefanov, P. and Zdujić, M. and Dondur, Vera and Paneva, D. and Mitov, I. and Rakić, Vesna",
year = "2008",
abstract = "Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  lt  MF series  lt  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Catalysis B-Environmental",
title = "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation",
pages = "198-186",
number = "2",
volume = "79",
doi = "10.1016/j.apcatb.2007.10.022"
}

Petrović, S., Terlecki-Bariević, A., Karanović, Lj., Kirilov-Stefanov, P., Zdujić, M., Dondur, V., Paneva, D., Mitov, I.,& Rakić, V.. (2008). LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental
Elsevier, Amsterdam., 79(2), 186-198.
https://doi.org/10.1016/j.apcatb.2007.10.022

Petrović S, Terlecki-Bariević A, Karanović L, Kirilov-Stefanov P, Zdujić M, Dondur V, Paneva D, Mitov I, Rakić V. LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental. 2008;79(2):186-198.
doi:10.1016/j.apcatb.2007.10.022 .

Petrović, S., Terlecki-Bariević, A., Karanović, Lj., Kirilov-Stefanov, P., Zdujić, M., Dondur, Vera, Paneva, D., Mitov, I., Rakić, Vesna, "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation" in Applied Catalysis B-Environmental, 79, no. 2 (2008):186-198,
https://doi.org/10.1016/j.apcatb.2007.10.022 . .

TY  - JOUR
AU  - Stošić, Dušan
AU  - Damjanović, Ljiljana
AU  - Hercigonja, Radmila
AU  - Dondur, Vera
AU  - Rac, Vladislav
AU  - Rakić, Vesna
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1647
AB  - L-histidine, a naturally occurring amino acid, was incorporated inside the supercages of FAU type zeolite in a form of Me-complex entity (Me = Cu(II), Zn(II), Fe(III)). The preparation was done either by ion-exchange procedure, or previously prepared Me-histidine complex was incorporated into the a cages of Y zeolite by occlusion. The preparation procedure was found to be a very important factor, as well as the amount of metal complex loaded on the zeolite. The characterization of obtained samples was performed using Diffuse Reflectance Ultraviolet-Visible Spectroscopy (DRUV-Vis), 13C MAS NMR and Infrared Spectroscopy (FTIR). It was noticed that 1-hostidine interacted with the zeolitic framework, and with the extra-framework cation, as well. The results obtained by TG-DSC/MAS technique, revealed that the thermal stability of incorporated histidine was increased, in comparison with that one of pure histidine.
AB  - U ovom radu, Me-histidin (Me = Zn(II), Cu(II), Fe(III)) kompleksi ugrađivani su u strukturu Yzeolita, primenom dva različita postupka: (1) Me-histidin kompleksi su pravljeni u dejonizovanoj vodi i zatim mešani sa NaY zeolitom, (2) histidinje rastvoren u vodi i u rastvor su dodavani jonski izmenjeni Y zeoliti. UV-spektroskopijom tečne faze je utvrđeno da je proces imobilizacije izvršen za 24 h. Ovako dobijem čvrsti materijali su detaljno okarakterisani hemijski i metodama XRD, NMR, IR, DR UV-VIS, dok su njihove termalne stabilnosti ispitivane primenom TG-DSC/MAS tehnike. Dobijem rezultati omogućili su poređenje osobina sintetisanih uzoraka.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - The incorporation of Me-histidine complexes in the structure of FAU-type zeolite: Characterization of the obtained materials
T1  - Ugradnja Me-histidin kompleksa u strukturu FAU zeolita - karakterizacija odbijenih materijala
EP  - 130
IS  - 3
SP  - 125
VL  - 62
DO  - 10.2298/HEMIND0803125S
ER  - 

@article{
author = "Stošić, Dušan and Damjanović, Ljiljana and Hercigonja, Radmila and Dondur, Vera and Rac, Vladislav and Rakić, Vesna",
year = "2008",
abstract = "L-histidine, a naturally occurring amino acid, was incorporated inside the supercages of FAU type zeolite in a form of Me-complex entity (Me = Cu(II), Zn(II), Fe(III)). The preparation was done either by ion-exchange procedure, or previously prepared Me-histidine complex was incorporated into the a cages of Y zeolite by occlusion. The preparation procedure was found to be a very important factor, as well as the amount of metal complex loaded on the zeolite. The characterization of obtained samples was performed using Diffuse Reflectance Ultraviolet-Visible Spectroscopy (DRUV-Vis), 13C MAS NMR and Infrared Spectroscopy (FTIR). It was noticed that 1-hostidine interacted with the zeolitic framework, and with the extra-framework cation, as well. The results obtained by TG-DSC/MAS technique, revealed that the thermal stability of incorporated histidine was increased, in comparison with that one of pure histidine., U ovom radu, Me-histidin (Me = Zn(II), Cu(II), Fe(III)) kompleksi ugrađivani su u strukturu Yzeolita, primenom dva različita postupka: (1) Me-histidin kompleksi su pravljeni u dejonizovanoj vodi i zatim mešani sa NaY zeolitom, (2) histidinje rastvoren u vodi i u rastvor su dodavani jonski izmenjeni Y zeoliti. UV-spektroskopijom tečne faze je utvrđeno da je proces imobilizacije izvršen za 24 h. Ovako dobijem čvrsti materijali su detaljno okarakterisani hemijski i metodama XRD, NMR, IR, DR UV-VIS, dok su njihove termalne stabilnosti ispitivane primenom TG-DSC/MAS tehnike. Dobijem rezultati omogućili su poređenje osobina sintetisanih uzoraka.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "The incorporation of Me-histidine complexes in the structure of FAU-type zeolite: Characterization of the obtained materials, Ugradnja Me-histidin kompleksa u strukturu FAU zeolita - karakterizacija odbijenih materijala",
pages = "130-125",
number = "3",
volume = "62",
doi = "10.2298/HEMIND0803125S"
}

Stošić, D., Damjanović, L., Hercigonja, R., Dondur, V., Rac, V.,& Rakić, V.. (2008). The incorporation of Me-histidine complexes in the structure of FAU-type zeolite: Characterization of the obtained materials. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 62(3), 125-130.
https://doi.org/10.2298/HEMIND0803125S

Stošić D, Damjanović L, Hercigonja R, Dondur V, Rac V, Rakić V. The incorporation of Me-histidine complexes in the structure of FAU-type zeolite: Characterization of the obtained materials. in Hemijska industrija. 2008;62(3):125-130.
doi:10.2298/HEMIND0803125S .

Stošić, Dušan, Damjanović, Ljiljana, Hercigonja, Radmila, Dondur, Vera, Rac, Vladislav, Rakić, Vesna, "The incorporation of Me-histidine complexes in the structure of FAU-type zeolite: Characterization of the obtained materials" in Hemijska industrija, 62, no. 3 (2008):125-130,
https://doi.org/10.2298/HEMIND0803125S . .

TY  - JOUR
AU  - Stošić, Dušan
AU  - Dondur, Vera
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Zakrzewska, Joanna S.
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1418
AB  - The plant alkaloid, nicotine, is a strongly toxic heterocyclic compound: the lethal dose for an adult human being (40-60 mg) is importantly lower in comparison with the other known poisons such as arsenic or strychni­ne. Cigarettes represent "the most toxic and addictive form of nicotine". Besides the negative effects of nicotine on public health produced by self-administration, recently another potentially very dangerous effect has been recognized: because of its miscibility with water, nicotine can be found in industrial wastewaters, and consequently, in groundwater. Therefore, the problem of nicotine removal from aqueous solutions has became an interesting topic. In this work, the removal of nicotine has been probed by adsorption on solid materials. Adsorption of nicotine on different zeolites (clinoptilolite, ZSM-5 and beta zeolite) and on activated carbon was investigated from aqueous solutions, at 298 K. The obtained results are presented as adsorption isotherms: the amount of adsorbed nicotine as a function of equilibrium concentration. These data were obtained from the residual amount of nicotine in the aqueous phase, by the use of UV spectroscopy. The highest amounts of adsorbed nicotine was found for activated carbon and p zeolite (~ mmol·g-1). The attempt to modify the adsorption properties of ZSM-5 zeolite has been also done: ZSM-5 was modified by ion-exchange with VIII group metal (Cu2+ and Fe3+). In addition, the adsorption of nicotine on ZSM-5 zeolite with different Si/Al ratios has been done. It has been noticed that ion-exchange did not improve the adsorption possibilities, while the adsorption was importantly lower in the case of higher silicon content in ZMS-5 structure. 13C NMR spectra were collected for suspensions formed of solid adsorbent and aqueous solution of nicotine; in this way, the part of nicotine molecule which is most probably connected with the adsorbent was recognized.
AB  - U ovom radu ispitivana je adsorpcija nikotina iz vodenih rastvora na različitim zeolitima (klinoptilolitu, ZSM-5 i beta zeolitu) kao i na aktivnom uglju visoke specifične površine; na 298K. Dobijeni rezultati prikazani su u formi adsorpcionih izotermi: količina adsorbovanog nikotina u funkciji od ravnotežnih koncentracija nikotina. Ovi podaci dobijeni su iz određivanja količine nikotina preostale u vodenoj fazi, metodom UV spektroskopije. Najveće količine adsorbovanog nikotina utvrđene su na aktivnom uglju i beta zeolitu (~ mmol/g). Iz 13C NMR spektara snimljenih iz suspenzije: čvrsti adsorbent-vodeni rastvor nikotina, utvrđen je atom ugljenika preko koga se molekul nikotina najverovatnije vezuje sa površinama zeolita.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Adsorption of nicotine on different zeolite types, from aqueous solutions
T1  - Adsorpcija nikotina iz vodenih rastvora na različitim vrstama zeolita
EP  - 128
IS  - 3
SP  - 123
VL  - 61
DO  - 10.2298/HEMIND0703123S
ER  - 

@article{
author = "Stošić, Dušan and Dondur, Vera and Rac, Vladislav and Rakić, Vesna and Zakrzewska, Joanna S.",
year = "2007",
abstract = "The plant alkaloid, nicotine, is a strongly toxic heterocyclic compound: the lethal dose for an adult human being (40-60 mg) is importantly lower in comparison with the other known poisons such as arsenic or strychni­ne. Cigarettes represent "the most toxic and addictive form of nicotine". Besides the negative effects of nicotine on public health produced by self-administration, recently another potentially very dangerous effect has been recognized: because of its miscibility with water, nicotine can be found in industrial wastewaters, and consequently, in groundwater. Therefore, the problem of nicotine removal from aqueous solutions has became an interesting topic. In this work, the removal of nicotine has been probed by adsorption on solid materials. Adsorption of nicotine on different zeolites (clinoptilolite, ZSM-5 and beta zeolite) and on activated carbon was investigated from aqueous solutions, at 298 K. The obtained results are presented as adsorption isotherms: the amount of adsorbed nicotine as a function of equilibrium concentration. These data were obtained from the residual amount of nicotine in the aqueous phase, by the use of UV spectroscopy. The highest amounts of adsorbed nicotine was found for activated carbon and p zeolite (~ mmol·g-1). The attempt to modify the adsorption properties of ZSM-5 zeolite has been also done: ZSM-5 was modified by ion-exchange with VIII group metal (Cu2+ and Fe3+). In addition, the adsorption of nicotine on ZSM-5 zeolite with different Si/Al ratios has been done. It has been noticed that ion-exchange did not improve the adsorption possibilities, while the adsorption was importantly lower in the case of higher silicon content in ZMS-5 structure. 13C NMR spectra were collected for suspensions formed of solid adsorbent and aqueous solution of nicotine; in this way, the part of nicotine molecule which is most probably connected with the adsorbent was recognized., U ovom radu ispitivana je adsorpcija nikotina iz vodenih rastvora na različitim zeolitima (klinoptilolitu, ZSM-5 i beta zeolitu) kao i na aktivnom uglju visoke specifične površine; na 298K. Dobijeni rezultati prikazani su u formi adsorpcionih izotermi: količina adsorbovanog nikotina u funkciji od ravnotežnih koncentracija nikotina. Ovi podaci dobijeni su iz određivanja količine nikotina preostale u vodenoj fazi, metodom UV spektroskopije. Najveće količine adsorbovanog nikotina utvrđene su na aktivnom uglju i beta zeolitu (~ mmol/g). Iz 13C NMR spektara snimljenih iz suspenzije: čvrsti adsorbent-vodeni rastvor nikotina, utvrđen je atom ugljenika preko koga se molekul nikotina najverovatnije vezuje sa površinama zeolita.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Adsorption of nicotine on different zeolite types, from aqueous solutions, Adsorpcija nikotina iz vodenih rastvora na različitim vrstama zeolita",
pages = "128-123",
number = "3",
volume = "61",
doi = "10.2298/HEMIND0703123S"
}

Stošić, D., Dondur, V., Rac, V., Rakić, V.,& Zakrzewska, J. S.. (2007). Adsorption of nicotine on different zeolite types, from aqueous solutions. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 61(3), 123-128.
https://doi.org/10.2298/HEMIND0703123S

Stošić D, Dondur V, Rac V, Rakić V, Zakrzewska JS. Adsorption of nicotine on different zeolite types, from aqueous solutions. in Hemijska industrija. 2007;61(3):123-128.
doi:10.2298/HEMIND0703123S .

Stošić, Dušan, Dondur, Vera, Rac, Vladislav, Rakić, Vesna, Zakrzewska, Joanna S., "Adsorption of nicotine on different zeolite types, from aqueous solutions" in Hemijska industrija, 61, no. 3 (2007):123-128,
https://doi.org/10.2298/HEMIND0703123S . .

TY  - CONF
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Gajinov, S.
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1342
AB  - In this work, room temperature interaction of n-hexane with HZSM-5 (Si/Al=20) and ion-exchanged samples containing one (CuZSM-5, FeZSM-5 and MnZSM-5) or two transition-metal cations (Fe,CuZSM-5; Cu,MnZSM-5 and Fe,MnZSM-5) was studied by microcalorimetry and TPD methods. Both differential heats and the amounts of n-hexane adsorbed per one unit cell were quantitatively determined. Higher heats of adsorption and higher amounts of adsorbed gas were found for ion-exchanged samples than for HZSM-5. The experiments of n-hexane adsorption on hydrated samples were also performed. The amounts of n-hexane adsorbed on hydrated ZSM-5 were lower in comparison with dehydrated samples, while the energies of interaction were similar.
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies
EP  - 245
IS  - 1
SP  - 239
VL  - 84
DO  - 10.1007/s10973-005-7164-z
ER  - 

@conference{
author = "Rac, Vladislav and Rakić, Vesna and Gajinov, S. and Dondur, Vera and Auroux, Aline",
year = "2006",
abstract = "In this work, room temperature interaction of n-hexane with HZSM-5 (Si/Al=20) and ion-exchanged samples containing one (CuZSM-5, FeZSM-5 and MnZSM-5) or two transition-metal cations (Fe,CuZSM-5; Cu,MnZSM-5 and Fe,MnZSM-5) was studied by microcalorimetry and TPD methods. Both differential heats and the amounts of n-hexane adsorbed per one unit cell were quantitatively determined. Higher heats of adsorption and higher amounts of adsorbed gas were found for ion-exchanged samples than for HZSM-5. The experiments of n-hexane adsorption on hydrated samples were also performed. The amounts of n-hexane adsorbed on hydrated ZSM-5 were lower in comparison with dehydrated samples, while the energies of interaction were similar.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies",
pages = "245-239",
number = "1",
volume = "84",
doi = "10.1007/s10973-005-7164-z"
}

Rac, V., Rakić, V., Gajinov, S., Dondur, V.,& Auroux, A.. (2006). Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 84(1), 239-245.
https://doi.org/10.1007/s10973-005-7164-z

Rac V, Rakić V, Gajinov S, Dondur V, Auroux A. Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies. in Journal of Thermal Analysis and Calorimetry. 2006;84(1):239-245.
doi:10.1007/s10973-005-7164-z .

Rac, Vladislav, Rakić, Vesna, Gajinov, S., Dondur, Vera, Auroux, Aline, "Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies" in Journal of Thermal Analysis and Calorimetry, 84, no. 1 (2006):239-245,
https://doi.org/10.1007/s10973-005-7164-z . .

TY  - CONF
AU  - Dondur, Vera
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Hercigonja, Radmila
AU  - Auroux, Aline
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1341
AB  - Temperature-programmed desorption coupled with mass spectrometer as a detector (TPD), IR and C-13 NMR measurements are used to study the adsorption of n-hexane on hydrated HZSM-5 and NH(4)ZSM-5 zeolites. The C-13 NMR measurements show that n-hexane can access the pore structure of ZSM-5 zeolites previously saturated with water. TPD spectra of n-hexane are monitored in the temperature region 50-300 degrees C, in the case of fully or partially hydrated samples; two-stage desorption of n-hexane is found. Simultaneous desorption of water and n-hexane in the same temperature region are found, in all investigated samples.
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites
EP  - 238
IS  - 1
SP  - 233
VL  - 84
DO  - 10.1007/s10973-005-7160-3
ER  - 

@conference{
author = "Dondur, Vera and Rakić, Vesna and Damjanović, Ljiljana and Hercigonja, Radmila and Auroux, Aline",
year = "2006",
abstract = "Temperature-programmed desorption coupled with mass spectrometer as a detector (TPD), IR and C-13 NMR measurements are used to study the adsorption of n-hexane on hydrated HZSM-5 and NH(4)ZSM-5 zeolites. The C-13 NMR measurements show that n-hexane can access the pore structure of ZSM-5 zeolites previously saturated with water. TPD spectra of n-hexane are monitored in the temperature region 50-300 degrees C, in the case of fully or partially hydrated samples; two-stage desorption of n-hexane is found. Simultaneous desorption of water and n-hexane in the same temperature region are found, in all investigated samples.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites",
pages = "238-233",
number = "1",
volume = "84",
doi = "10.1007/s10973-005-7160-3"
}

Dondur, V., Rakić, V., Damjanović, L., Hercigonja, R.,& Auroux, A.. (2006). Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 84(1), 233-238.
https://doi.org/10.1007/s10973-005-7160-3

Dondur V, Rakić V, Damjanović L, Hercigonja R, Auroux A. Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites. in Journal of Thermal Analysis and Calorimetry. 2006;84(1):233-238.
doi:10.1007/s10973-005-7160-3 .

Dondur, Vera, Rakić, Vesna, Damjanović, Ljiljana, Hercigonja, Radmila, Auroux, Aline, "Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites" in Journal of Thermal Analysis and Calorimetry, 84, no. 1 (2006):233-238,
https://doi.org/10.1007/s10973-005-7160-3 . .

TY  - JOUR
AU  - Milojević, Maja
AU  - Damjanović, Ljiljana
AU  - Dondur, Vera
AU  - Rakić, Vesna
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1152
AB  - The oxidation-reduction properties of iron cations exchanged into zeolites have been know for some time and zeolites that contain ion-exchanged iron are known to be catalytically active for several reduction-oxidation type reactions. Different methods are suited for preparing Fe-ZSM-5 catalysts like addition of iron during the hydrothermal synthesis of ZSM-5, ion exchange in the liquid phase, solid-state ion exchange, or sublimation (chemical vapor deposition) of FeCl3. The nature and local environment of iron species is strongly dependent on the synthetic route, which influences their catalytic performance. In the work presented here, Fe-ZSM-5 catalysts have been obtained from a hydrogen form of the zeolite ZSM-5, with Si/Al=15 purchased from Zeolyst International. Fe-ZSM-5 catalysts were prepared using Fe-citrate and Fe-oxalate solutions. The obtained samples were characterized by IR, TG, XRPD method and temperature programmed desorption (TPD) technique. The effect of ion exchange procedures on the activity of Fe-ZSM-5 catalysts was studied by n-hexane adsorption experiments. The main aim of this work was to evaluate and compare the influence of ion exchange procedure on the active sites for adsorption in the investigated samples.
AB  - Zeoliti koji poseduju jone gvožđa su vrlo važni katalizatori u oksidoredukcionim reakcijama, kako u gasovima, tako i u rastvorima. U ovom radu su napravljeni i okarakterisani uzorci Fe-ZSM-5 zeolita koji su sintetisani iz Fe-oksalatnog i po prvi put, Fe-citratnog rastvora. Pokazano je da stepen izmene jako zavisi od uslova sinteze i da se mehanizam izmene u prisustvu Fe-citrata i Fe-oksalata znatno razlikuje. Oba tipa uzoraka u hidratisanoj formi adsorbuju nepolarni molekul n-heksana. TPD-MS i TG rezultati ukazuju da se heksan različito vezuje na uzorcima dobijenim iz rastvora Fe-citrata u odnosu na uzorke dobijene iz Feoksalata.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika - Novi materijali
T1  - Characterization and activity of Fe-ZSM-5 catalysts prepared by ion exchange procedure in Fe-citrate and Fe-oxalate solutions
T1  - Karakterizacija Fe-ZSM-5 katalizatora dobijenog jonskom izmenom u rastvorima Fe-citrata i Fe-oksalata
EP  - 13
IS  - 1
SP  - 7
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1152
ER  - 

@article{
author = "Milojević, Maja and Damjanović, Ljiljana and Dondur, Vera and Rakić, Vesna",
year = "2006",
abstract = "The oxidation-reduction properties of iron cations exchanged into zeolites have been know for some time and zeolites that contain ion-exchanged iron are known to be catalytically active for several reduction-oxidation type reactions. Different methods are suited for preparing Fe-ZSM-5 catalysts like addition of iron during the hydrothermal synthesis of ZSM-5, ion exchange in the liquid phase, solid-state ion exchange, or sublimation (chemical vapor deposition) of FeCl3. The nature and local environment of iron species is strongly dependent on the synthetic route, which influences their catalytic performance. In the work presented here, Fe-ZSM-5 catalysts have been obtained from a hydrogen form of the zeolite ZSM-5, with Si/Al=15 purchased from Zeolyst International. Fe-ZSM-5 catalysts were prepared using Fe-citrate and Fe-oxalate solutions. The obtained samples were characterized by IR, TG, XRPD method and temperature programmed desorption (TPD) technique. The effect of ion exchange procedures on the activity of Fe-ZSM-5 catalysts was studied by n-hexane adsorption experiments. The main aim of this work was to evaluate and compare the influence of ion exchange procedure on the active sites for adsorption in the investigated samples., Zeoliti koji poseduju jone gvožđa su vrlo važni katalizatori u oksidoredukcionim reakcijama, kako u gasovima, tako i u rastvorima. U ovom radu su napravljeni i okarakterisani uzorci Fe-ZSM-5 zeolita koji su sintetisani iz Fe-oksalatnog i po prvi put, Fe-citratnog rastvora. Pokazano je da stepen izmene jako zavisi od uslova sinteze i da se mehanizam izmene u prisustvu Fe-citrata i Fe-oksalata znatno razlikuje. Oba tipa uzoraka u hidratisanoj formi adsorbuju nepolarni molekul n-heksana. TPD-MS i TG rezultati ukazuju da se heksan različito vezuje na uzorcima dobijenim iz rastvora Fe-citrata u odnosu na uzorke dobijene iz Feoksalata.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika - Novi materijali",
title = "Characterization and activity of Fe-ZSM-5 catalysts prepared by ion exchange procedure in Fe-citrate and Fe-oxalate solutions, Karakterizacija Fe-ZSM-5 katalizatora dobijenog jonskom izmenom u rastvorima Fe-citrata i Fe-oksalata",
pages = "13-7",
number = "1",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1152"
}

Milojević, M., Damjanović, L., Dondur, V.,& Rakić, V.. (2006). Characterization and activity of Fe-ZSM-5 catalysts prepared by ion exchange procedure in Fe-citrate and Fe-oxalate solutions. in Tehnika - Novi materijali
Savez inženjera i tehničara Srbije, Beograd., 15(1), 7-13.
https://hdl.handle.net/21.15107/rcub_agrospace_1152

Milojević M, Damjanović L, Dondur V, Rakić V. Characterization and activity of Fe-ZSM-5 catalysts prepared by ion exchange procedure in Fe-citrate and Fe-oxalate solutions. in Tehnika - Novi materijali. 2006;15(1):7-13.
https://hdl.handle.net/21.15107/rcub_agrospace_1152 .

Milojević, Maja, Damjanović, Ljiljana, Dondur, Vera, Rakić, Vesna, "Characterization and activity of Fe-ZSM-5 catalysts prepared by ion exchange procedure in Fe-citrate and Fe-oxalate solutions" in Tehnika - Novi materijali, 15, no. 1 (2006):7-13,
https://hdl.handle.net/21.15107/rcub_agrospace_1152 .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Dondur, Vera
AU  - Rakić, Vesna
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1098
AB  - In this work, the free energy changes and entropy changes of adsorption of n-hexane on zeolites of the MxNa87-2xX (M=Co,Ni,Zn,Cd) type were determined using their isosteric sorption heats. It was found that the exchange of Na ions in NaX with bivalent cations (Co, Ni, Zn, Cd) significantly alters the adsorption characteristics of NaX zeolite. The free energy changes and entropy changes of n-hexane adsorption were dependent on the surface coverage and on the nature of the charge-balancing cation. The specific influence of the exchanged cations on the free energy changes and entropy changes of sorption of n-hexane originates from the size, location and electronic configuration of the cation.
AB  - U ovom radu su određene promene slobodne energije i promena entropije adsorpcije n-heksana na zeolitima tipa MxNa87-2xX (M=Co,Ni,Zn,Cd) na osnovu izosternih toplota sorpcije. Pokazano je da izmena Na+ jona u NaX zeolitu dvovalentnim katjonima (Co,Ni,Zn,Cd) značajno menja adsorpcione karakteristike NaX zeolita. Takođe je utvrđeno da promena slobodne energije i promena entropije adsorpcije n-heksana zavisi i od stepena pokrivenosti površine zeolita.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - A study of the adsorption thermodynamics of n-hexane on ion-exchanged X zeolites
T1  - Termodinamika adsorpcije n-heksana na jonski izmenjenim X zeolitima
EP  - 1418
IS  - 12
SP  - 1409
VL  - 70
DO  - 10.2298/JSC0512409H
ER  - 

@article{
author = "Hercigonja, Radmila and Dondur, Vera and Rakić, Vesna",
year = "2005",
abstract = "In this work, the free energy changes and entropy changes of adsorption of n-hexane on zeolites of the MxNa87-2xX (M=Co,Ni,Zn,Cd) type were determined using their isosteric sorption heats. It was found that the exchange of Na ions in NaX with bivalent cations (Co, Ni, Zn, Cd) significantly alters the adsorption characteristics of NaX zeolite. The free energy changes and entropy changes of n-hexane adsorption were dependent on the surface coverage and on the nature of the charge-balancing cation. The specific influence of the exchanged cations on the free energy changes and entropy changes of sorption of n-hexane originates from the size, location and electronic configuration of the cation., U ovom radu su određene promene slobodne energije i promena entropije adsorpcije n-heksana na zeolitima tipa MxNa87-2xX (M=Co,Ni,Zn,Cd) na osnovu izosternih toplota sorpcije. Pokazano je da izmena Na+ jona u NaX zeolitu dvovalentnim katjonima (Co,Ni,Zn,Cd) značajno menja adsorpcione karakteristike NaX zeolita. Takođe je utvrđeno da promena slobodne energije i promena entropije adsorpcije n-heksana zavisi i od stepena pokrivenosti površine zeolita.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "A study of the adsorption thermodynamics of n-hexane on ion-exchanged X zeolites, Termodinamika adsorpcije n-heksana na jonski izmenjenim X zeolitima",
pages = "1418-1409",
number = "12",
volume = "70",
doi = "10.2298/JSC0512409H"
}

Hercigonja, R., Dondur, V.,& Rakić, V.. (2005). A study of the adsorption thermodynamics of n-hexane on ion-exchanged X zeolites. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 70(12), 1409-1418.
https://doi.org/10.2298/JSC0512409H

Hercigonja R, Dondur V, Rakić V. A study of the adsorption thermodynamics of n-hexane on ion-exchanged X zeolites. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2005;70(12):1409-1418.
doi:10.2298/JSC0512409H .

Hercigonja, Radmila, Dondur, Vera, Rakić, Vesna, "A study of the adsorption thermodynamics of n-hexane on ion-exchanged X zeolites" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 70, no. 12 (2005):1409-1418,
https://doi.org/10.2298/JSC0512409H . .

TY  - JOUR
AU  - Dondur, Vera
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Auroux, Aline
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1014
AB  - This review summarizes some of the recently published results concerning the acid sites in the zeolites ZSM-5 and Y studied by temperature-programmed desorption (TPD) and adsorption calorimetry using different probe molecules NH3, CO, N2O and n-hexane. For the first time it has been shown that the acid sites in hydrated zeolites are accessible for n-hexane adsorption.
AB  - U ovom radu je prikazan pregled ispitivanja kiselih aktivnih centara kod zeolita ZSM-5 i Y temperaturski programiranom desorpcijom (TPD) i adsorpcionom mikrokalorimetrijom uz korišćenje različitih probnih molekula: NH3, CO, N2O i n-heksana. Prvi put je pokazana adsorpcija n-heksana na kiselim centrima hidratisanih zeolita.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Comparative study of the active sites in zeolites by different probe molecules
T1  - Uporedno ispitivanje aktivnih centara zeolita različitim probnim molekulima
EP  - 474
IS  - 3
SP  - 457
VL  - 70
DO  - 10.2298/JSC0503457D
ER  - 

@article{
author = "Dondur, Vera and Rakić, Vesna and Damjanović, Ljiljana and Auroux, Aline",
year = "2005",
abstract = "This review summarizes some of the recently published results concerning the acid sites in the zeolites ZSM-5 and Y studied by temperature-programmed desorption (TPD) and adsorption calorimetry using different probe molecules NH3, CO, N2O and n-hexane. For the first time it has been shown that the acid sites in hydrated zeolites are accessible for n-hexane adsorption., U ovom radu je prikazan pregled ispitivanja kiselih aktivnih centara kod zeolita ZSM-5 i Y temperaturski programiranom desorpcijom (TPD) i adsorpcionom mikrokalorimetrijom uz korišćenje različitih probnih molekula: NH3, CO, N2O i n-heksana. Prvi put je pokazana adsorpcija n-heksana na kiselim centrima hidratisanih zeolita.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Comparative study of the active sites in zeolites by different probe molecules, Uporedno ispitivanje aktivnih centara zeolita različitim probnim molekulima",
pages = "474-457",
number = "3",
volume = "70",
doi = "10.2298/JSC0503457D"
}

Dondur, V., Rakić, V., Damjanović, L.,& Auroux, A.. (2005). Comparative study of the active sites in zeolites by different probe molecules. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 70(3), 457-474.
https://doi.org/10.2298/JSC0503457D

Dondur V, Rakić V, Damjanović L, Auroux A. Comparative study of the active sites in zeolites by different probe molecules. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2005;70(3):457-474.
doi:10.2298/JSC0503457D .

Dondur, Vera, Rakić, Vesna, Damjanović, Ljiljana, Auroux, Aline, "Comparative study of the active sites in zeolites by different probe molecules" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 70, no. 3 (2005):457-474,
https://doi.org/10.2298/JSC0503457D . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1004
AB  - The behavior of copper-, iron- and cobalt-exchanged ZSM-5 (Si/Al = 20) and bimetallic forms of the same zeolite was investigated with reference to the adsorption of N2O and CO at 303 K. The interactions of both gases with investigated zeolites have been studied using microcalorimetry and infrared spectroscopy. The values of differential heats of adsorption and the amounts of adsorbed gases were determined. Both gases react with the charge-balancing cations as active sites for adsorption. CuZSM-5 shows significantly better performances than FeZSM-5 and CoZSM-5, toward both gases; additionally, nitrous oxide can be chemisorbed on CuZSM-5. Adsorption capabilities of FeZSM-5 and CoZSM5 are increased with the addition of copper ions. The heats of CO interaction with copper-containing samples have been found to be higher then the heats of N2O interaction, while for FeZSM-5 and CoZSM-5 samples similar heats were detected for both gases. In the case of CuZSM-5, as a result of competitive adsorption between previously adsorbed N2O and incoming CO from the gas phase, a surface reaction is found.
PB  - Elsevier, Amsterdam
C3  - Catalysis Today
T1  - Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite
EP  - 280
IS  - 3-4
SP  - 272
VL  - 110
DO  - 10.1016/j.cattod.2005.09.027
ER  - 

@conference{
author = "Rakić, Vesna and Rac, Vladislav and Dondur, Vera and Auroux, Aline",
year = "2005",
abstract = "The behavior of copper-, iron- and cobalt-exchanged ZSM-5 (Si/Al = 20) and bimetallic forms of the same zeolite was investigated with reference to the adsorption of N2O and CO at 303 K. The interactions of both gases with investigated zeolites have been studied using microcalorimetry and infrared spectroscopy. The values of differential heats of adsorption and the amounts of adsorbed gases were determined. Both gases react with the charge-balancing cations as active sites for adsorption. CuZSM-5 shows significantly better performances than FeZSM-5 and CoZSM-5, toward both gases; additionally, nitrous oxide can be chemisorbed on CuZSM-5. Adsorption capabilities of FeZSM-5 and CoZSM5 are increased with the addition of copper ions. The heats of CO interaction with copper-containing samples have been found to be higher then the heats of N2O interaction, while for FeZSM-5 and CoZSM-5 samples similar heats were detected for both gases. In the case of CuZSM-5, as a result of competitive adsorption between previously adsorbed N2O and incoming CO from the gas phase, a surface reaction is found.",
publisher = "Elsevier, Amsterdam",
journal = "Catalysis Today",
title = "Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite",
pages = "280-272",
number = "3-4",
volume = "110",
doi = "10.1016/j.cattod.2005.09.027"
}

Rakić, V., Rac, V., Dondur, V.,& Auroux, A.. (2005). Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite. in Catalysis Today
Elsevier, Amsterdam., 110(3-4), 272-280.
https://doi.org/10.1016/j.cattod.2005.09.027

Rakić V, Rac V, Dondur V, Auroux A. Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite. in Catalysis Today. 2005;110(3-4):272-280.
doi:10.1016/j.cattod.2005.09.027 .

Rakić, Vesna, Rac, Vladislav, Dondur, Vera, Auroux, Aline, "Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite" in Catalysis Today, 110, no. 3-4 (2005):272-280,
https://doi.org/10.1016/j.cattod.2005.09.027 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Gajivon, S
AU  - Auroux, Aline
PY  - 2004
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/872
AB  - Copper ion-exchanged ZSM5 zeolites have been prepared with different cooper loadings from under- to over-exchanged levels. The adsorptions of N2O and CO at 303 K have been studied using calorimetric method and infrared spectroscopy. The samples were additionally characterised by ammonia adsorption at 423 K. The active sites for both N2O and CO are Cu(I) ions, which were formed as a result of pre-treatment in vacuum at 673 K. Room temperature adsorption of nitrous oxide at low equilibrium pressures (up to 66.7 Pa) resulted in small amounts of chemisorbed N2O ( lt 0.2 molecule per one Cu ion). Differential heats of N2O adsorption between 80 and 30kJ/mol were obtained. Differential heats of CO adsorption between 140 and 40 kJ/mol were obtained. The obtained amounts of chemisorbed species in the investigated systems and the values of differential heats of both nitrous oxide and carbon monoxide demonstrate the dependence on the copper content.
PB  - Elsevier, Amsterdam
C3  - Thermochimica Acta
T1  - Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites
EP  - 57
IS  - 1-2
SP  - 51
VL  - 420
DO  - 10.1016/j.tca.2003.12.030
ER  - 

@conference{
author = "Rakić, Vesna and Dondur, Vera and Gajivon, S and Auroux, Aline",
year = "2004",
abstract = "Copper ion-exchanged ZSM5 zeolites have been prepared with different cooper loadings from under- to over-exchanged levels. The adsorptions of N2O and CO at 303 K have been studied using calorimetric method and infrared spectroscopy. The samples were additionally characterised by ammonia adsorption at 423 K. The active sites for both N2O and CO are Cu(I) ions, which were formed as a result of pre-treatment in vacuum at 673 K. Room temperature adsorption of nitrous oxide at low equilibrium pressures (up to 66.7 Pa) resulted in small amounts of chemisorbed N2O ( lt 0.2 molecule per one Cu ion). Differential heats of N2O adsorption between 80 and 30kJ/mol were obtained. Differential heats of CO adsorption between 140 and 40 kJ/mol were obtained. The obtained amounts of chemisorbed species in the investigated systems and the values of differential heats of both nitrous oxide and carbon monoxide demonstrate the dependence on the copper content.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites",
pages = "57-51",
number = "1-2",
volume = "420",
doi = "10.1016/j.tca.2003.12.030"
}

Rakić, V., Dondur, V., Gajivon, S.,& Auroux, A.. (2004). Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites. in Thermochimica Acta
Elsevier, Amsterdam., 420(1-2), 51-57.
https://doi.org/10.1016/j.tca.2003.12.030

Rakić V, Dondur V, Gajivon S, Auroux A. Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites. in Thermochimica Acta. 2004;420(1-2):51-57.
doi:10.1016/j.tca.2003.12.030 .

Rakić, Vesna, Dondur, Vera, Gajivon, S, Auroux, Aline, "Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites" in Thermochimica Acta, 420, no. 1-2 (2004):51-57,
https://doi.org/10.1016/j.tca.2003.12.030 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Hercigonja, Radmila
PY  - 2003
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/661
AB  - In this work Fourier transform infrared (FTIR) study has been applied to study the adsorption of carbon monoxide on transition metal (Mn2+, Co2 Ni2+) ion-exchanged zeolites type Y, X and mordenites. The adsorption of CO at room temperature produces overlapping IR absorption bands in the 2120–2200 cm-1 region. The frequency of the band around 2200 cm-1 is found to be dependent not only on the charge-balancing transition metal cation but also on the framework composition. The frequencies of the band near 1600 cm-1 was found to be dependent on the Si/Al ratio of the investigated zeolites.
AB  - U ovom radu ispitivana je adsorpcija ugljen-monoksida na izmenjenim zeolitima (Mn2+, Co2+, Ni2+) tipa X, Y i mordenita primenom infracrvene spektroskopije sa Furijeovom analizom (FTIR). Adsorpcijom CO na sobnoj temperaturi nastaju složene trake u spektralnoj oblasti od 2120 do 2200 cm-1.Uočeno je da frekvencija trake na oko 2200 cm-1 zavisi i od katjona prisutnog u strukturi, i od sastava same zeolitske rešetke. Uočeno je takođe da frekvencije traka na oko 1600 cm-1 zavise od strukture, odnosno od Si/Al odnosa ispitivanih zeolita.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - FTIR study of carbon monoxide adsorption on ion-exchanged X, Y and mordenite type zeolites
T1  - FTIR studija adsorpcije ugljen-monoksida na izmenjenim zeolitima tipa X, Y i mordenita
EP  - 416
IS  - 4-5
SP  - 409
VL  - 68
DO  - 10.2298/JSC0305409R
ER  - 

@article{
author = "Rakić, Vesna and Dondur, Vera and Hercigonja, Radmila",
year = "2003",
abstract = "In this work Fourier transform infrared (FTIR) study has been applied to study the adsorption of carbon monoxide on transition metal (Mn2+, Co2 Ni2+) ion-exchanged zeolites type Y, X and mordenites. The adsorption of CO at room temperature produces overlapping IR absorption bands in the 2120–2200 cm-1 region. The frequency of the band around 2200 cm-1 is found to be dependent not only on the charge-balancing transition metal cation but also on the framework composition. The frequencies of the band near 1600 cm-1 was found to be dependent on the Si/Al ratio of the investigated zeolites., U ovom radu ispitivana je adsorpcija ugljen-monoksida na izmenjenim zeolitima (Mn2+, Co2+, Ni2+) tipa X, Y i mordenita primenom infracrvene spektroskopije sa Furijeovom analizom (FTIR). Adsorpcijom CO na sobnoj temperaturi nastaju složene trake u spektralnoj oblasti od 2120 do 2200 cm-1.Uočeno je da frekvencija trake na oko 2200 cm-1 zavisi i od katjona prisutnog u strukturi, i od sastava same zeolitske rešetke. Uočeno je takođe da frekvencije traka na oko 1600 cm-1 zavise od strukture, odnosno od Si/Al odnosa ispitivanih zeolita.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "FTIR study of carbon monoxide adsorption on ion-exchanged X, Y and mordenite type zeolites, FTIR studija adsorpcije ugljen-monoksida na izmenjenim zeolitima tipa X, Y i mordenita",
pages = "416-409",
number = "4-5",
volume = "68",
doi = "10.2298/JSC0305409R"
}

Rakić, V., Dondur, V.,& Hercigonja, R.. (2003). FTIR study of carbon monoxide adsorption on ion-exchanged X, Y and mordenite type zeolites. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 68(4-5), 409-416.
https://doi.org/10.2298/JSC0305409R

Rakić V, Dondur V, Hercigonja R. FTIR study of carbon monoxide adsorption on ion-exchanged X, Y and mordenite type zeolites. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2003;68(4-5):409-416.
doi:10.2298/JSC0305409R .

Rakić, Vesna, Dondur, Vera, Hercigonja, Radmila, "FTIR study of carbon monoxide adsorption on ion-exchanged X, Y and mordenite type zeolites" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 68, no. 4-5 (2003):409-416,
https://doi.org/10.2298/JSC0305409R . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Hercigonja, Radmila
AU  - Andrić, Velibor
PY  - 2003
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/601
AB  - The active sites of hydrogen-exchanged Y zeolite (HY) and dealuminated (HDY) zeolites are investigated by TPD of carbon monoxide. Only the high temperature TPD spectra of CO (T(M)approximate to620-690degreesC) were observed, meaning that CO molecules interact with very strong acid sites. The amounts of CO bonded on these sites are small (less than 1 molecule per unit cell). The strong influence of dealumination on the coverage degree is found. The calculated values for kinetic parameters indicate chemisorption of CO in the investigated systems (E(des)approximate to240 kJ mol(-1), Aapproximate to10(11) s(-1)).
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide
EP  - 767
IS  - 3
SP  - 761
VL  - 72
DO  - 10.1023/A:1025049727731
ER  - 

@conference{
author = "Rakić, Vesna and Dondur, Vera and Hercigonja, Radmila and Andrić, Velibor",
year = "2003",
abstract = "The active sites of hydrogen-exchanged Y zeolite (HY) and dealuminated (HDY) zeolites are investigated by TPD of carbon monoxide. Only the high temperature TPD spectra of CO (T(M)approximate to620-690degreesC) were observed, meaning that CO molecules interact with very strong acid sites. The amounts of CO bonded on these sites are small (less than 1 molecule per unit cell). The strong influence of dealumination on the coverage degree is found. The calculated values for kinetic parameters indicate chemisorption of CO in the investigated systems (E(des)approximate to240 kJ mol(-1), Aapproximate to10(11) s(-1)).",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide",
pages = "767-761",
number = "3",
volume = "72",
doi = "10.1023/A:1025049727731"
}

Rakić, V., Dondur, V., Hercigonja, R.,& Andrić, V.. (2003). The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 72(3), 761-767.
https://doi.org/10.1023/A:1025049727731

Rakić V, Dondur V, Hercigonja R, Andrić V. The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide. in Journal of Thermal Analysis and Calorimetry. 2003;72(3):761-767.
doi:10.1023/A:1025049727731 .

Rakić, Vesna, Dondur, Vera, Hercigonja, Radmila, Andrić, Velibor, "The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide" in Journal of Thermal Analysis and Calorimetry, 72, no. 3 (2003):761-767,
https://doi.org/10.1023/A:1025049727731 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Mioč, Ubavka B.
AU  - Jovanović, D
PY  - 2002
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/488
AB  - The microcalorimetric technique has been applied to investigate the strongest active sites of zeolites, heteropolyacids and perovskites. The differential heats of adsorption of carbon monoxide, ammonia and oxygen were determined. The results imply that the method is very useful in the identification and characterization of the most reactive active sites of solid catalytic materials.
PB  - Springer/Plenum Publishers, New York
C3  - Topics in Catalysis
T1  - Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts
EP  - 247
IS  - 3-4
SP  - 241
VL  - 19
DO  - 10.1023/A:1015328526702
ER  - 

@conference{
author = "Rakić, Vesna and Dondur, Vera and Mioč, Ubavka B. and Jovanović, D",
year = "2002",
abstract = "The microcalorimetric technique has been applied to investigate the strongest active sites of zeolites, heteropolyacids and perovskites. The differential heats of adsorption of carbon monoxide, ammonia and oxygen were determined. The results imply that the method is very useful in the identification and characterization of the most reactive active sites of solid catalytic materials.",
publisher = "Springer/Plenum Publishers, New York",
journal = "Topics in Catalysis",
title = "Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts",
pages = "247-241",
number = "3-4",
volume = "19",
doi = "10.1023/A:1015328526702"
}

Rakić, V., Dondur, V., Mioč, U. B.,& Jovanović, D.. (2002). Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts. in Topics in Catalysis
Springer/Plenum Publishers, New York., 19(3-4), 241-247.
https://doi.org/10.1023/A:1015328526702

Rakić V, Dondur V, Mioč UB, Jovanović D. Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts. in Topics in Catalysis. 2002;19(3-4):241-247.
doi:10.1023/A:1015328526702 .

Rakić, Vesna, Dondur, Vera, Mioč, Ubavka B., Jovanović, D, "Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts" in Topics in Catalysis, 19, no. 3-4 (2002):241-247,
https://doi.org/10.1023/A:1015328526702 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Hercigonja, Radmila
PY  - 2001
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/330
AB  - The interactions of carbon monoxide with Lewis acid sites of zeolites were investigated using microcalorimetric and temperature programmed desorption (TPD) techniques. Carbon monoxide was adsorbed at 25 degreesC on transition-metal ion-exchanged FAU (Y and X) and MOR type zeolites. The differential heats of adsorption (Q(dif)) indicate the heterogeneity of the acid sites, in all the investigated systems. The specific interactions of CO with the strongest acid sites were recognized. The results of TPD confirm that CO molecules were adsorbed on the sites of different strength.
PB  - Elsevier, Amsterdam
C3  - Thermochimica Acta
T1  - Thermal effects of the interactions of carbon monoxide with zeolites
EP  - 84
IS  - 1-2
SP  - 77
VL  - 379
DO  - 10.1016/S0040-6031(01)00605-0
ER  - 

@conference{
author = "Rakić, Vesna and Dondur, Vera and Hercigonja, Radmila",
year = "2001",
abstract = "The interactions of carbon monoxide with Lewis acid sites of zeolites were investigated using microcalorimetric and temperature programmed desorption (TPD) techniques. Carbon monoxide was adsorbed at 25 degreesC on transition-metal ion-exchanged FAU (Y and X) and MOR type zeolites. The differential heats of adsorption (Q(dif)) indicate the heterogeneity of the acid sites, in all the investigated systems. The specific interactions of CO with the strongest acid sites were recognized. The results of TPD confirm that CO molecules were adsorbed on the sites of different strength.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Thermal effects of the interactions of carbon monoxide with zeolites",
pages = "84-77",
number = "1-2",
volume = "379",
doi = "10.1016/S0040-6031(01)00605-0"
}

Rakić, V., Dondur, V.,& Hercigonja, R.. (2001). Thermal effects of the interactions of carbon monoxide with zeolites. in Thermochimica Acta
Elsevier, Amsterdam., 379(1-2), 77-84.
https://doi.org/10.1016/S0040-6031(01)00605-0

Rakić V, Dondur V, Hercigonja R. Thermal effects of the interactions of carbon monoxide with zeolites. in Thermochimica Acta. 2001;379(1-2):77-84.
doi:10.1016/S0040-6031(01)00605-0 .

Rakić, Vesna, Dondur, Vera, Hercigonja, Radmila, "Thermal effects of the interactions of carbon monoxide with zeolites" in Thermochimica Acta, 379, no. 1-2 (2001):77-84,
https://doi.org/10.1016/S0040-6031(01)00605-0 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Hercigonja, Radmila
AU  - Dondur, Vera
PY  - 1999
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/156
AB  - The interaction of carbon monoxide with the cationic Lewis acid sites of transition-metal (Fe2+, Co2+, Ni2+) and Cu2+-exchanged Y and X zeolites was investigated by Fourier transform infrared spectroscopy (FTIR) and temperature-programmed desorption (TPD). The activation of the sample, the adsorption (at room temperature) of CO and the detection of desorbed molecular species were done in situ, either with FTIR or with a mass spectrometer, in gas-flow systems. During the adsorption of CO from the gas stream, a low surface coverage (between two and seven molecules per unit cell) was achieved. In the case of CuY and CuX zeolites, the TPD/MAS spectra exhibit only CO signals. During adsorption of CO, IR absorption bands in the 2200-2000 cm(-1) spectral region, characteristic for symmetric stretching of CO adsorbed on zeolites, were collected in the FTIR spectra, indicating molecular adsorption of CO on Cu2+-exchanged samples. In the case of all other samples investigated, disproportionation of CO was noticed during its adsorption and temperature-programmed desorption. IR absorption bands near 2350 cm(-1), characteristic for nu(3) asymmetric stretching of weakly bound CO2 on zeolites, and IR absorption bands in the 2200-2000 cm(-1) spectral region were collected during adsorption of CO on Fe2+-, Co2+- and Ni2+-exchanged samples. In the TPD/MAS spectra both CO and CO2 signals were monitored. Significant amounts of carbon deposits (between two and nine carbon atoms deposited per unit cell of the zeolite) were found after adsorption and TPD procedures.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - CO interaction with zeolites studied by TPD and FTIR: transition-metal ion-exchanged FAU-type zeolites
EP  - 39
IS  - 1
SP  - 27
VL  - 27
DO  - 10.1016/S1387-1811(98)00224-8
ER  - 

@article{
author = "Rakić, Vesna and Hercigonja, Radmila and Dondur, Vera",
year = "1999",
abstract = "The interaction of carbon monoxide with the cationic Lewis acid sites of transition-metal (Fe2+, Co2+, Ni2+) and Cu2+-exchanged Y and X zeolites was investigated by Fourier transform infrared spectroscopy (FTIR) and temperature-programmed desorption (TPD). The activation of the sample, the adsorption (at room temperature) of CO and the detection of desorbed molecular species were done in situ, either with FTIR or with a mass spectrometer, in gas-flow systems. During the adsorption of CO from the gas stream, a low surface coverage (between two and seven molecules per unit cell) was achieved. In the case of CuY and CuX zeolites, the TPD/MAS spectra exhibit only CO signals. During adsorption of CO, IR absorption bands in the 2200-2000 cm(-1) spectral region, characteristic for symmetric stretching of CO adsorbed on zeolites, were collected in the FTIR spectra, indicating molecular adsorption of CO on Cu2+-exchanged samples. In the case of all other samples investigated, disproportionation of CO was noticed during its adsorption and temperature-programmed desorption. IR absorption bands near 2350 cm(-1), characteristic for nu(3) asymmetric stretching of weakly bound CO2 on zeolites, and IR absorption bands in the 2200-2000 cm(-1) spectral region were collected during adsorption of CO on Fe2+-, Co2+- and Ni2+-exchanged samples. In the TPD/MAS spectra both CO and CO2 signals were monitored. Significant amounts of carbon deposits (between two and nine carbon atoms deposited per unit cell of the zeolite) were found after adsorption and TPD procedures.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "CO interaction with zeolites studied by TPD and FTIR: transition-metal ion-exchanged FAU-type zeolites",
pages = "39-27",
number = "1",
volume = "27",
doi = "10.1016/S1387-1811(98)00224-8"
}

Rakić, V., Hercigonja, R.,& Dondur, V.. (1999). CO interaction with zeolites studied by TPD and FTIR: transition-metal ion-exchanged FAU-type zeolites. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 27(1), 27-39.
https://doi.org/10.1016/S1387-1811(98)00224-8

Rakić V, Hercigonja R, Dondur V. CO interaction with zeolites studied by TPD and FTIR: transition-metal ion-exchanged FAU-type zeolites. in Microporous and Mesoporous Materials. 1999;27(1):27-39.
doi:10.1016/S1387-1811(98)00224-8 .

Rakić, Vesna, Hercigonja, Radmila, Dondur, Vera, "CO interaction with zeolites studied by TPD and FTIR: transition-metal ion-exchanged FAU-type zeolites" in Microporous and Mesoporous Materials, 27, no. 1 (1999):27-39,
https://doi.org/10.1016/S1387-1811(98)00224-8 . .