Physicochemical characterization of the interaction between cobalt molybdenum oxide and silicon dioxide--1. Influence of the cobalt-molybdenum ratio

Journal Article · Thu Jun 28 00:00:00 EDT 1979 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100476a017· OSTI ID:6635376

Gajardo, P; Grange, P; Delmon, B

Unsupported and silica-supported cobalt-molybdenum oxide hydrodesulfurization catalysts containing 0-100Vertical Bar3< cobalt were studied by atomic absorption, ESCA, X-ray analysis, gravimetric oxidation-reduction measurements, and ESR and diffuse reflectance spectroscopy. The results showed that MoO/sub 3/ is present, probably as a polymolybdate that interacts with the silicate; that a nearly stoichiometric CoMoO/sub 4/ is formed; that excess cobalt forms mainly Co/sub 3/O/sub 4/; that the high hydrodesulfurization activity of the supported catalyst containing 27Vertical Bar3< cobalt is probably due to its high dispersion; and that cobalt catalyzes the reduction of molybdenum(VI) and (V) to molybdenum(IV).

• Research Organization: Univ. Catholique Louvain
• OSTI ID: 6635376
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 83:13; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical &amp; Physicochemical Properties
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
DATA
DESULFURIZATION
DISPERSIONS
EXPERIMENTAL DATA
INFORMATION
MINERALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
QUANTITY RATIO
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS