Measurement of heat of argon adsorption for the evaluation of relative acid strength of some sulfated metal oxides and H-type zeolites

Authors
Matsuhashi, H Tanaka, T Arata, K
Citation
H. Matsuhashi et al., Measurement of heat of argon adsorption for the evaluation of relative acid strength of some sulfated metal oxides and H-type zeolites, J PHYS CH B, 105(40), 2001, pp. 9669-9671
Citations number
13
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
15206106 → ACNP
Volume
105
Issue
40
Year of publication
2001
Pages
9669 - 9671
Database
ISI
SICI code
1520-6106(20011011)105:40<9669:MOHOAA>2.0.ZU;2-7
Abstract
The relative acid strength of sulfated SnO2, sulfated ZrO2, silica-alumina, H-Y, H-ZSM-5, and H-mordenite was estimated by the heat of Ar adsorption, calculated from a temperature dependence of amount of Ar adsorption around room temperature. These were 23.5, 23.6, and 13.8-16.5 kJ mol(-1) for sulfa ted SnO2, sulfated ZrO2, and H-type zeolites, respectively. The data indica te that Ar is suitable for a probe molecule of acid sites on solid surface and that this technique is useful for evaluation of the acid strength of so lid superacids.