Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5
Apstrakt
Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed t...o the lowest ordering of the obtained solid-like n-hexane phase.
Ključne reči:
confinement media / adsorption / entropy / microcalorimetry / ZSM-5Izvor:
JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 2015, 80, 10, 1297-1309Izdavač:
- Srpsko hemijsko društvo, Beograd
Finansiranje / projekti:
- Porozni materijali na bazi oksida u zaštiti životne sredine od genotoksičnih supstanci (RS-MESTD-Basic Research (BR or ON)-172018)
DOI: 10.2298/JSC150203032H
ISSN: 0352-5139
WoS: 000364206300007
Scopus: 2-s2.0-84957604728
Institucija/grupa
Poljoprivredni fakultetTY - JOUR AU - Hercigonja, Radmila AU - Rac, Vladislav AU - Rakić, Vesna AU - Auroux, Aline PY - 2015 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/3743 AB - Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase. PB - Srpsko hemijsko društvo, Beograd T2 - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY T1 - Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5 EP - 1309 IS - 10 SP - 1297 VL - 80 DO - 10.2298/JSC150203032H ER -
@article{ author = "Hercigonja, Radmila and Rac, Vladislav and Rakić, Vesna and Auroux, Aline", year = "2015", abstract = "Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase.", publisher = "Srpsko hemijsko društvo, Beograd", journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY", title = "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5", pages = "1309-1297", number = "10", volume = "80", doi = "10.2298/JSC150203032H" }
Hercigonja, R., Rac, V., Rakić, V.,& Auroux, A.. (2015). Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY Srpsko hemijsko društvo, Beograd., 80(10), 1297-1309. https://doi.org/10.2298/JSC150203032H
Hercigonja R, Rac V, Rakić V, Auroux A. Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2015;80(10):1297-1309. doi:10.2298/JSC150203032H .
Hercigonja, Radmila, Rac, Vladislav, Rakić, Vesna, Auroux, Aline, "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 80, no. 10 (2015):1297-1309, https://doi.org/10.2298/JSC150203032H . .