Hydrodesulfurization--4. Effects of the feed components on Co-Mo/Al/sub 2/O/sub 3/ catalyst activation

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · J. Catal.; (United States)

OSTI ID:6320062

Gissy, H; Bartsch, R; Tanielian, C

A Girder G35 catalyst was reduced, sulfided at 400/sup 0/C by various treatments, and tested for the hydrodesulfurization of 0.3% benzothiophene in n-dodecane. The steady-state conversion at 250/sup 0/C was 75% if the reduced catalyst was pretreated with 6% H/sub 2/S in hydrogen; it was 58% if n-dodecane was added to the H/sub 2/S/H/sub 2/ feed; it was 50% if the catalyst was first treated with n-dodecane in hydrogen and then with H/sub 2/S in hydrogen; it was 45% if the two steps of the previous treatment were reversed; it was 36% on the untreated reduced catalyst; it was 33% if the catalyst was pretreated only with n-dodecane in hydrogen; it was 43% if the catalyst was treated with thiophene in hydrogen; and it was 28% if the pretreatment was done with hydrogen/thiophene/dodecane. These results and analyses of the events during the pretreating and initial transient reaction stages indicated that both n-dodecane and benzothiophene poison a part of the surface sites by coke lay-down, but that on the presulfided catalyst, benzothiophene protected the catalyst from deactivating by competing with solvent adsorption and by preventing desulfiding of the catalyst.

• Research Organization: Univ. of Strasbourg
• OSTI ID: 6320062
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 65:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPLEXES
COMPLEXES
DATA
DEACTIVATION
DESULFURIZATION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
MOLYBDENUM COMPLEXES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REDUCTION
STEADY-STATE CONDITIONS
SULFIDATION
SYNTHESIS
THIOPHENE
TRANSITION ELEMENT COMPLEXES