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Catalytic reactions of hydrocarbons over Pt--Pd alloys. I. Skeletal reactions of C/sub 5/ and C/sub 6/ alkanes over Pt--Pd alloy films

Journal Article · · J. Catal.; (United States)
OSTI ID:6184095
;

The reactions of neopentane, n-pentane, and n-hexane in the presence of an excess of hydrogen have been studied on evaporated films of Pt--Pd alloys as catalysts. The selectivity in neopentane isomerization on a pure Pd film has been found to be nonnegligible, in contrast with previous work in the literature. The neopentane isomerization vs alloy composition pattern is interpreted in terms of an inferred surface composition. The results may be easily explained assuming a one-Pt-site mechanism for isomerization and a two-Pd-site mechanism for hydrogenolysis. The 1,5-cyclization selectivity pattern in the n-pentane reaction is interpreted in terms of the change in active site number. In the n-hexane conversion the ratio of selectivity towards 1,6- versus 1,5-cyclization is higher for alloys than for pure metals. 4 figures, 1 table.

Research Organization:
Inst. of Physical Chemistry, Warsaw, Poland
OSTI ID:
6184095
Journal Information:
J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 56:3; ISSN JCTLA
Country of Publication:
United States
Language:
English

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Related Subjects

2-2-DIMETHYLPROPANE
2-METHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
CYCLOALKANES
DATA
DATA FORMS
DIMENSIONS
ELEMENTS
ETHANE
EXPERIMENTAL DATA
FILMS
FLUIDS
GASES
HEXANE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
INFORMATION
ISOLATED VALUES
ISOMERS
KINETICS
METHANE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PALLADIUM ALLOYS
PENTANE
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
PROPANE
REACTION KINETICS
SPECIFICITY
TEMPERATURE DEPENDENCE
THICKNESS
YIELDS