Hydrodesulfurization of oxidized sulfur compounds in benzothiophene, methylbenzothiophene, and dibenzothiophene series over CoO-MoO/sub 3/-Al/sub 2/O/sub 3/ catalyst
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), Vol. 61:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrodesulfurization of thiophene, benzothiophene, dibenzothiophene, and related compounds catalyzed by sulfided CoO--MoO/sub 3//. gamma. -Al/sub 2/O/sub 3/: low-pressure reactivity studies
Hydrotreating of halogeno-benzo(b)thiophenes and their S-oxide and S-dioxide derivatives over CoO-MoO/sub 3//Al/sub 2/O/sub 3/ catalyst
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
CATALYTIC EFFECTS
COBALT OXIDES
HETEROCYCLIC COMPOUNDS
DESULFURIZATION
MOLYBDENUM OXIDES
SULFONES
SULFOXIDES
SULFUR
CHEMICAL REACTIONS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
HIGH TEMPERATURE
ISOLATED VALUES
MEDIUM PRESSURE
ORGANIC SULFUR COMPOUNDS
OXIDATION
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COBALT COMPOUNDS
DATA
DATA FORMS
ELEMENTS
INFORMATION
KINETICS
MOLYBDENUM COMPOUNDS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
TRANSITION ELEMENT COMPOUNDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties
010402 - Coal
Lignite
& Peat- Purification & Upgrading