Studies of molybdenum sulfide catalysts: effects of pretreatment on olefin hydrogenation activity

Journal Article · Tue Apr 01 04:00:00 EST 1986 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(86)90348-9· OSTI ID:5231214

Kalthod, D G; Weller, S W

Various models have been proposed for the active sites in hydrogenation and hydrogenolysis reactions on molybdenum sulfide catalysts. The role played by edge and basal sites of the sulfide in both oxygen chemisorption and in hydrogenation is still moot, although the question has been often investigated. The authors have chosen to study the effect of catalyst preparation and pretreatment on the properties of unsupported molybdenum disulfide, to avoid some of the problems involved in characterizing supported catalysts. The unsupported sulfide was prepared in situ by the thermal decomposition of ammonium tetrathiomolybdate (ATTM) in flowing helium. In the present paper, unsupported molybdenum sulfide catalysts have been tested for catalytic activity in propene hydrogenation after various pretreatments. This was selected as a test reaction because it gives good conversions at temperatures below the TPR peaks; these mild conditions do not destroy the effects of catalyst pretreatment. Activity was measured with a pulse method, with determination of kinetic constants by a procedure recently described. 44 references.

• Research Organization: State Univ. of New York, Buffalo (USA)
• OSTI ID: 5231214
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 98:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
AMMONIUM COMPOUNDS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISORPTION
HYDROCARBONS
HYDROGENATION
MOLYBDATES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROPYLENE
REDUCTION
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SORPTION
SULFIDES
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS