Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations
Apstrakt
In this work, the values of entropy changes related to n-hexane adsorption onto cation exchanged Y zeolite were calculated from differential heats. Various transition metal cations (Co2+, Ni2+, Zn2+ and Cd2+) were introduced into the lattice of the parent NaY, and the existence of enthalpy-entropy compensation effect related to n-hexane adsorption, id. est, the linearity of -triangle H vs. -triangle S plots was examined. The compensation effect was confirmed for all investigated zeolites. The compensation effect can be comprehended as governed by ion-induced dipole interaction between highly polarizing cationic centers in zeolite and nonopolar n-hexane molecules. Finally, the compensation effect and so the compensation temperature were found to depend on the type of charge-balancing cation (charge, size and electronic configuration).
Ključne reči:
Enthalpy-entropy compensation / Compensation temperatures / Zeolite / Transition metal cationsIzvor:
Science of Sintering, 2015, 47, 1, 83-88Izdavač:
- Međunarodni Institut za nauku o sinterovanju, Beograd
Finansiranje / projekti:
DOI: 10.2298/SOS1501091H
ISSN: 0350-820X
WoS: 000355226700010
Scopus: 2-s2.0-84928804090
Institucija/grupa
Poljoprivredni fakultetTY - JOUR AU - Hercigonja, Radmila AU - Rakić, Vesna PY - 2015 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/3787 AB - In this work, the values of entropy changes related to n-hexane adsorption onto cation exchanged Y zeolite were calculated from differential heats. Various transition metal cations (Co2+, Ni2+, Zn2+ and Cd2+) were introduced into the lattice of the parent NaY, and the existence of enthalpy-entropy compensation effect related to n-hexane adsorption, id. est, the linearity of -triangle H vs. -triangle S plots was examined. The compensation effect was confirmed for all investigated zeolites. The compensation effect can be comprehended as governed by ion-induced dipole interaction between highly polarizing cationic centers in zeolite and nonopolar n-hexane molecules. Finally, the compensation effect and so the compensation temperature were found to depend on the type of charge-balancing cation (charge, size and electronic configuration). PB - Međunarodni Institut za nauku o sinterovanju, Beograd T2 - Science of Sintering T1 - Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations EP - 88 IS - 1 SP - 83 VL - 47 DO - 10.2298/SOS1501091H ER -
@article{ author = "Hercigonja, Radmila and Rakić, Vesna", year = "2015", abstract = "In this work, the values of entropy changes related to n-hexane adsorption onto cation exchanged Y zeolite were calculated from differential heats. Various transition metal cations (Co2+, Ni2+, Zn2+ and Cd2+) were introduced into the lattice of the parent NaY, and the existence of enthalpy-entropy compensation effect related to n-hexane adsorption, id. est, the linearity of -triangle H vs. -triangle S plots was examined. The compensation effect was confirmed for all investigated zeolites. The compensation effect can be comprehended as governed by ion-induced dipole interaction between highly polarizing cationic centers in zeolite and nonopolar n-hexane molecules. Finally, the compensation effect and so the compensation temperature were found to depend on the type of charge-balancing cation (charge, size and electronic configuration).", publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd", journal = "Science of Sintering", title = "Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations", pages = "88-83", number = "1", volume = "47", doi = "10.2298/SOS1501091H" }
Hercigonja, R.,& Rakić, V.. (2015). Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations. in Science of Sintering Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 83-88. https://doi.org/10.2298/SOS1501091H
Hercigonja R, Rakić V. Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations. in Science of Sintering. 2015;47(1):83-88. doi:10.2298/SOS1501091H .
Hercigonja, Radmila, Rakić, Vesna, "Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations" in Science of Sintering, 47, no. 1 (2015):83-88, https://doi.org/10.2298/SOS1501091H . .