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.
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 . .
