Catalytic properties of transition metal carbides II. Activity of bulk mixed carbides of molybdenum and tungsten in hydrocarbon conversion
- Universite des Sciences et Techniques de Lille Flandres-Artois (France)
- Universite de Poitiers (France)
- Ugicarb Morgon, Grenoble (France)
The dehydrogenation of cyclohexane and the hydrogenolysis of butane were studied on bulk tungsten-molybdenum mixed carbides as a function of their composition. Some analogies with noble metals have been confirmed for selectivity in hydrogenolysis. Tungsten carbide gives only single hydrogenolysis like platinum, while molybdenum carbide leads to multiple hydrogenolysis like ruthenium. When the activities in cyclohexane dehydrogenation and butane hydrogenolysis are plotted versus the relative surface composition Mo/(Mo + W), curves with a minimum are obtained. This change of the activities of the mixed carbide catalysts correlates with the molybdenum surface enrichment deduced from XPS results.
- OSTI ID:
- 6410495
- Journal Information:
- Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 117:2; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALKANES
BUTANE
CARBIDES
CARBON COMPOUNDS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CYCLOALKANES
CYCLOHEXANE
DEHYDROGENATION
ELECTRON SPECTROSCOPY
ELEMENTS
HYDROCARBONS
METALS
MOLYBDENUM CARBIDES
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM
PLATINUM METALS
QUANTITY RATIO
REFRACTORY METAL COMPOUNDS
RUTHENIUM
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
X-RAY SPECTROSCOPY