Kinetics of hydrodesulfurization of benzothiophene catalyzed by sulfided Co-Mo/Al/sub 2/O/sub 3/
Kinetics of the hydrodesulfurization of benzothiophene (BT) to give ethylbenzene was measured with a steady-state differential flow microreactor containing particles of sulfided Co-Mo/Al/sub 2/O/sub 3/ catalyst at 252 to 332/sup 0/C. Partial pressures of reactant species were varied in the following ranges: BT, 0.015 to 0.23; H/sub 2/, 0.20 to 2.0; and H/sub 2/S, 0.02 to 0.14 atm. Catalyst deactivation was negligible over hundreds of hours of operation. Rate equations of the Langmuir-Hinshelwood type were compared with the rate data using a nonlinear least-squares regression technique. No single equation with a prudent number of parameters gave a good fit at all three temperatures. The kinetics results demonstrate the competitive adsorption of BT and H/sub 2/S on one kind of catalytic site and of hydrogen on another. The literature indicates that thiophene is about half as reactive as BT under these conditions, and a comparison of the kinetics results for the two reactants suggests a similarity in the mechanisms of their reactions. 3 figures, 2 tables.
- Research Organization:
- Univ. of Delaware, Newark
- OSTI ID:
- 5011692
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 62:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
DESULFURIZATION
ELEMENTS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
KINETICS
LOW PRESSURE
METALS
MOLYBDENUM
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFRACTORY METALS
SORPTION
STEADY-STATE CONDITIONS
SULFIDES
SULFUR COMPOUNDS
THIONAPHTHENES
TRANSITION ELEMENTS