Anderson-type heteropolyoxomolybdates in catalysis - 2. EXAFS study on gamma-Al2O3-supported Mo, Co and Ni sulfided phases as HDS catalysts

Authors
Pettiti, I Botto, IL Cabello, CI Colonna, S Faticanti, M Minelli, G Porta, P Thomas, HJ
Citation
I. Pettiti et al., Anderson-type heteropolyoxomolybdates in catalysis - 2. EXAFS study on gamma-Al2O3-supported Mo, Co and Ni sulfided phases as HDS catalysts, APP CATAL A, 220(1-2), 2001, pp. 113-121
Citations number
34
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
220
Issue
1-2
Year of publication
2001
Pages
113 - 121
Database
ISI
SICI code
0926-860X(20011025)220:1-2<113:AHIC-2>2.0.ZU;2-O
Abstract
The nature of the Co (or Ni) and Mo sulfided species obtained starting from gamma -Al2O3-supported Anderson heteropolyoxomolybdates (CoMo6 and NiMo6) has been analyzed by means of the extended X-ray absorption fine structure (EXAFS) technique with the aid of temperature-programmed reduction (TPR) an d spectroscopic measurements. Results are discussed in relation to the adso rption isotherms and to the catalytic activity for the thiophene hydrodesul furization (HDS) reaction. A comparison with traditional catalysts has been made. (C) 2001 Elsevier Science B.V. All rights reserved.