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)).
Ključne reči:
CO / dealuminated Y zeolite / TPD
Izvor:
Journal of Thermal Analysis and Calorimetry, 2003, 72, 3, 761-767
Napomena:
8th European Symposium on Thermal Analysis and Calorimetry (ESTAC-8), Aug 25-29, 2002, Barcelona, Spain
TY - JOUR
AU - Rakić, Vesna M.
AU - Dondur, Vera
AU - Hercigonja, Radmila V.
AU - Andrić, Velibor
PY - 2003
UR - https://vinar.vin.bg.ac.rs/handle/123456789/6374
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)).
T2 - Journal of Thermal Analysis and Calorimetry
T1 - The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide
VL - 72
IS - 3
SP - 761
EP - 767
DO - 10.1023/A:1025049727731
ER -
@article{
author = "Rakić, Vesna M. and Dondur, Vera and Hercigonja, Radmila V. 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)).",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide",
volume = "72",
number = "3",
pages = "761-767",
doi = "10.1023/A:1025049727731"
}
Rakić, V. M., Dondur, V., Hercigonja, R. V.,& 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, 72(3), 761-767.
https://doi.org/10.1023/A:1025049727731
Rakić VM, Dondur V, Hercigonja RV, 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 M., Dondur, Vera, Hercigonja, Radmila V., 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 . .
