Pt/Al/sub 2/O/sub 3/--2. Activity and selectivity patterns for methylcyclopropane (MCP) hydrogenolysis and cyclopentane (CP) exchange with deuterium comparison with Pt/SiO/sub 2/
The turnover frequency for isobutane formation in MCP hydrogenolysis at 16:1 hydrogen/MCP and 0/sup 0/C on the previously decribed alumina-supported platinum catalysts was independent of the percentage of exposed platinum atoms (Dh). The selectivity for isobutane and n-butane was also independent of Dh. The activity levels depended on type and severity of pretreatment and preparation temperatures, i.e., had minima at 100/sup 0/-200/sup 0/C, possibly as a result of incomplete reduction, and of temperature-dependent changes in the surface morphology and platinum-aluminum interaction. The deuterium exchange of CP at 81/sup 0/C on the Pt/Al/sub 2/O/sub 3/ catalysts depended somewhat on Dh, depended on the pretreatment, and depended on an unknown third factor. The results were compared with results obtained in corresponding tests on silica-supported platinum.
- Research Organization:
- Northwestern Univ.
- OSTI ID:
- 6456549
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 64:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
CYCLOALKANES
DECOMPOSITION
DEUTERIUM
ELEMENTS
HYDROCARBONS
HYDROGEN ISOTOPES
HYDROLYSIS
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
LYSIS
METALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
SILICON COMPOUNDS
SILICON OXIDES
SOLVOLYSIS
STABLE ISOTOPES
SURFACE PROPERTIES
TEMPERATURE EFFECTS
TRANSITION ELEMENTS