Kinetics of hydrodesulfurization of benzothiophene catalyzed by sulfided Co-Mo/Al/sub 2/O/sub 3/
Benzo(b)thiophene was used as model for heavier petroleum feedstocks, e.g., gas oil, in a kinetic hydrodesulfurization study at 252.5/sup 0/, 302.0/sup 0/, and 332.5/sup 0/C and 0.015-0.232 atm benzothiophene, 0.215-2.04 atm hydrogen, 0.020-0.142 atm hydrogen sulfide (necessary to maintain steady-state catalyst activity), and 0.812-1.24 atm helium. The tests were conducted in a flow microreactor over a previously described commercial, sulfided, alumina-supported cobalt/molybdenum catalyst. The data obtained at 302/sup 0/ and 332.5/sup 0/C suggested saturation kinetics in benzothiophene, but data obtained at 252.5/sup 0/C show a maximum in conversion vs. benzothiophene pressure plot, which indicated complicated kinetics. The reaction was inhibited by hydrogen sulfide. The data were correlated by one of several Langmuir-Hinshelwood equations tested for best fit. The apparent activation energy was 20 +/- 3 kcal/mole. A comparison with literature data showed that benzothiophene was about twice as reactive as thiophene at the conditions tested and about half as reactive at 70 atm, and probably reacts by a similar mechanism to that proposed by Lee and Butt for thiophene.
- Research Organization:
- Univ. of Delaware
- OSTI ID:
- 6342906
- 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
020400* -- Petroleum-- Processing
ACTIVATION ENERGY
CHALCOGENIDES
CHEMICAL FEEDSTOCKS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COBALT
COMPARATIVE EVALUATIONS
DATA
DESULFURIZATION
ELEMENTS
ENERGY
ENERGY SOURCES
EQUATIONS
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GAS OILS
GASES
HELIUM
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
INHIBITION
KINETIC EQUATIONS
KINETICS
LOW PRESSURE
MAINTENANCE
MEDIUM PRESSURE
METALS
MOLYBDENUM
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PRESSURE DEPENDENCE
RARE GASES
REACTION KINETICS
SATURATION
STEADY-STATE CONDITIONS
SULFIDATION
SULFIDES
SULFUR COMPOUNDS
TESTING
THIONAPHTHENES
THIOPHENE
TRANSITION ELEMENTS