Homologation, hydrogenolysis, and dehydrogenation of ethane on SiO/sub 2/- and SiO/sub 2/-Al/sub 2/O/sub 3/-supported reduced molybdenum oxide catalysts
Kinetics and reaction mechanisms of homologation, hydrogenolysis, and dehydrogenation of ethane were studied on reduced molybdenum oxides supported on SiO/sub 2/ and SiO/sub 2/-Al/sub 2/O/sub 3/. It was found that homologation of ethane to propane occurs via (1) dehydrogenation of ethane to ethylene, (2) homologation of ethylene to propylene, and (3) hydrogenation of propylene to propane. The rate-determining step was found to be hydrogenation of adsorbed propylene or that of adsorbed C/sub 2/H/sub 5/ species with an activation energy of 10.7 kcal/mole. In addition to homologation products, significant amounts of hydrogenolysis and dehydrogenation reaction products were also found. Dehydrogenation of ethane to ethylene had an activation energy of 25 kcal/mole, and it was quite similar to that for desorption of ethylene. Consequently, the dehydrogenation rate was assumed to be controlled by desorption of ethylene formed.
- Research Organization:
- Hokkaido Univ., Kita-ku (Japan)
- OSTI ID:
- 5231479
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 108:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ACTIVATION ENERGY
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEHYDROGENATION
ENERGY
ETHANE
ETHYLENE
HYDROCARBONS
HYDROGENATION
KINETICS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROPANE
PROPYLENE
REACTION INTERMEDIATES
REACTION KINETICS
REFORMER PROCESSES
REFRACTORY METAL COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS