Study of alumina-cobalt-molybdenum hydrodesulfurization catalysts
Physicochemical methods have been used in investigating Al/sub 2/O/sub 3/-CoO-MoO/sub 3/ catalysts of various compositions after carrying out the reaction of thiophene hydrodesulfurization. It is suggested that the active components in the Al/sub 2/O/sub 3/-CoO-MoO/sub 3/ catalysts with high Al/sub 2/O/sub 3/ contents are located on the surface of the support in the form of microcrystals or clusters; the proposed model is that of a cluster on the surface of the support in commercial Al/sub 2/O/sub 3/-CoO-MoO/sub 3/ catalyst. It is shown that, under the conditions of reaction, the original oxides and molybdates of Al and Co are reduced and sulfided to form sulfides and oxysulfides. The Al/sub 2/O/sub 3/ support retards the reduction of the sulfided forms quite considerably. The active component of commercial Al/sub 2/O/sub 3/-CoO-MoO/sub 3/ catalyst is a product of partial sulfurization of CoMoO/sub 4/ (cobalt molybdate oxysulfide).
- Research Organization:
- Inst. of the Chemistry of Petroleum, Tomsk, USSR
- OSTI ID:
- 6715843
- Journal Information:
- Kinet. Catal. (USSR) (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (USSR) (Engl. Transl.); (United States) Vol. 21:2; ISSN KICAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
COHERENT SCATTERING
COMPARATIVE EVALUATIONS
CRYSTALS
DESULFURIZATION
DIFFRACTION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN
INFRARED SPECTRA
MEASURING METHODS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
SCATTERING
SPECTRA
SPECTROSCOPY
SYNTHESIS
THERMOGRAPHY
THIOPHENE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION