ULTRAFINE CATALYSTS FOR HYDRODESULFURIZAT ION .2. SURFACE-PROPERTIES OF UFP-MO AL2O3 CATALYSTS/

Citation
Lj. Feng et al., ULTRAFINE CATALYSTS FOR HYDRODESULFURIZAT ION .2. SURFACE-PROPERTIES OF UFP-MO AL2O3 CATALYSTS/, Gaodeng xuexiao huaxue xuebao, 16(1), 1995, pp. 103-106
Citations number
7
Categorie Soggetti
Chemistry
ISSN journal
02510790
Volume
16
Issue
1
Year of publication
1995
Pages
103 - 106
Database
ISI
SICI code
0251-0790(1995)16:1<103:UCFHI.>2.0.ZU;2-Q
Abstract
XPS was used for determining the surface properties of UFP-Mo/Al2O3. I t is shown that all molybdenum existed in Mo6+ form on the surface of oxidized UFP-Mo/Al2O3 catalysts, while a mixture of Mo6+, Mo4+, S6+ as well as S2- was observed on the surface of the catalysts after HDS re action. The ratio of Mo and S species with different valences ispronou ncedly affedted by the preparation method and the Mo loading. The port ion of Mo6+ and S6+ decreases with increasing Mo loading. The contents of Mo6+ and S6+ Of s-UFP-MO/Al2O3 catalysts are higher than those of i-UFP-Mo/Al2O3 for the same Mo loading.