The investigation of strong active sites of dealuminated Y-type zeolite by TPD of carbon monoxide
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)).
Keywords:
CO / dealuminated Y zeolite / TPDSource:
Journal of Thermal Analysis and Calorimetry, 2003, 72, 3, 761-767Publisher:
- Springer, Dordrecht
DOI: 10.1023/A:1025049727731
ISSN: 1388-6150
WoS: 000184396400001
Scopus: 2-s2.0-0042698815
Collections
Institution/Community
Poljoprivredni fakultetTY - 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 . .