X-ray photoelectron spectroscopic (XPS) study of unsupported cobalt-molybdenum sulfide catalysts

Journal Article · Sun Dec 31 23:00:00 EST 1978 · J. Catal.; (United States)

OSTI ID:7139043

Delvaux, G; Grange, P; Delmon, B

XPS spectra were obtained for nine fully sulfided used cobalt/molybdenum catalysts with 0-100Vertical Bar3< cobalt content, and the spectral information correlated with composition, surface area, and activity for the isomerization of cyclohexane, hydrogenation of cyclohexene, and hydrogenolysis of thiophene. The results suggest that the hydrodesulfurization and isomerization maximum in the synergistic range of composition (15-50Vertical Bar3< cobalt) is due to a combination of higher activity per surface area and a high surface area; and that the active sites involve a molybdenum species with a charge between tri- and tetravalent molybdenum.

• Research Organization: Univ. Catholique Louvain
• OSTI ID: 7139043
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 56:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical &amp; Physicochemical Properties
400301 -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALKANES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT SULFIDES
CYCLOALKANES
CYCLOHEXANE
DATA
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGENATION
INFORMATION
ISOMERIZATION
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
QUANTITY RATIO
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SULFIDES
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
SYNERGISM
TRANSITION ELEMENT COMPOUNDS