Hydrodesulfurization of oxidized sulfur compounds in benzothiophene, methylbenzothiophene, and dibenzothiophene series over CoO-MoO/sub 3/-Al/sub 2/O/sub 3/ catalyst

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Catal.; (United States)

OSTI ID:5295567

Geneste, P; Amblard, P; Bonnet, M; Graffin, P

Hydrodesulfurization experiments were carried out with a sulfided CoO-MoO/sub 3/-Al/sub 2/O/sub 3/ catalyst at various elevated pressures (30 to 70 atm) and temperatures (200 to 300/sup 0/C) under stirred batch reactor conditions. The reactants were hydrogen and pure sulfur compounds including dibenzothiophene, benzothiophene and its methyl derivatives, and their oxidized products, sulfoxides and sulfones. In the case of dibenzothiophene the reaction is the C-S bond scission without any observed hydrogenation of the aromatic ring. For the S-oxidized compounds a deoxygenation takes place first and the sulfide reacts as before. For benzothiophene (BT) and its methyl derivatives there is first a hydrogenation of the C/sub 2-3/ thiophenic double bond and then desulfurization leading to ethylbenzene derivatives. For the sulfoxides a deoxygenation takes place first but for the sulfones (BTO/sub 2/) as for the sulfide the hydrogenation is operative. Methyl substitution leads to a decrease in the rate of the hydrogenation step in the BT and BTO/sub 2/ series. A correlation, related to the overall aromaticity of the system, between the rate constants and the vertical ionization potential of the molecules, suggests that electronic effects may be preponderant. 35 references, 9 figures, 7 tables.

• Research Organization: Laboratoire de Chimie Organique Physique Appliquee, Montpellier Cedex, France
• OSTI ID: 5295567
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
DATA
DATA FORMS
DESULFURIZATION
ELEMENTS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
INFORMATION
ISOLATED VALUES
KINETICS
MEDIUM PRESSURE
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
REACTION KINETICS
SULFONES
SULFOXIDES
SULFUR
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS