Hydrodesulfurization of thiophene over CoMo, NiMo, and NiW/Al sub 2 O sub 3 catalysts; Kinetics and adsorption

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Industrial and Engineering Chemistry Research; (USA)

DOI:https://doi.org/10.1021/ie00103a010· OSTI ID:5941080

Ihm, S K; Moon, S J; Choi, H J ^[1]

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1. Dept. of Chemical Engineering, Korea Advanced Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul (KR)

Three commercial catalytic systems, CoMo/Al{sub 2}O{sub 3}, NiMo/Al{sub 2}O{sub 3}, and NiW/Al{sub 2}O{sub 3}, were used for the kinetic study of the hydrode sulfurization (HDS) of thiophene. Some Langmuir-Hinshelwood type rate equations were discriminated for each catalyst by using a nonlinear regression method. Adsorption equilibrium constants were measured at the reaction temperatures independently by the chromatographic pulse echnique. The effects of different kinds of active metals on the type of rate equation and kinetic parameters obtained are compared. The same type of rate equations gave good correlations under the reaction condition of atmospheric pressure and 275-325{degrees}C, irrespective of the kinds of active metals. However, the NiW system showed the possibility of higher hydrogenation functionality through the relatively weaker adsorption of thiophene and H{sub 2}S than for the CoMo or NiMo system. It is also found that hydrogen adsorption was very weak compared to other reactants and was not a dissociative type under the present reaction conditions. The results of the kinetic study are very consistent with those of the separate adsorption study.

• OSTI ID: 5941080
• Journal Information: Industrial and Engineering Chemistry Research; (USA), Vol. 29:7; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
CATALYSTS
CHEMICAL REACTION KINETICS
THIOPHENE
DESULFURIZATION
ALUMINIUM OXIDES
CATALYTIC EFFECTS
COBALT ALLOYS
EQUATIONS
HYDROCRACKING
MOLYBDENUM ALLOYS
NICKEL ALLOYS
TUNGSTEN ALLOYS
ALLOYS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
HETEROCYCLIC COMPOUNDS
KINETICS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION KINETICS
THERMOCHEMICAL PROCESSES
400201* - Chemical & Physicochemical Properties
400105 - Separation Procedures
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