Structure of oxide CoMo/. gamma. -Al/sub 2/O/sub 3/ hydrodesulfurization catalysts an XPS (X-ray photoelectron spectroscopy) and DRS (diffuse reflectance spectroscopy) study

Journal Article · Thu May 01 00:00:00 EDT 1980 · J. Catal.; (United States)

OSTI ID:6200512

Gajardo, P; Grange, P; Delmon, B

The study provided evidence for the existence of five different species on the catalysts, i.e., molybdenum in multilayer polymolybdate structures similar to MoO/sub 3/ bulk; a molybdenum(VI) monolayer; a cobalt-molybdenum bilayer; Co/sub 3/O/sub 4/ crystallites; and cobalt aluminate, CoAl/sub 2/O/sub 4/. The existence and distribution of these species depended on preparation method, metal ratios, and calcination conditions. The monolayer molybdenum improves the dispersion of cobalt, which forms crystallites in the absence of the monolayer.

• Research Organization: Univ. Catholique Louvain
• OSTI ID: 6200512
• Journal Information: J. Catal.; (United States), Vol. 63:1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DESULFURIZATION
CALCINATION
CHEMICAL PREPARATION
COBALT COMPLEXES
EXPERIMENTAL DATA
MOLYBDENUM COMPLEXES
X-RAY SPECTROSCOPY
CHEMICAL REACTIONS
COMPLEXES
DATA
DECOMPOSITION
INFORMATION
NUMERICAL DATA
PYROLYSIS
SPECTROSCOPY
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties