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Surface interaction in the Pt/. gamma. -Al/sub 2/O/sub 3/ system. III. The reaction of neopentane with H/sub 2/

Journal Article · · J. Catal.; (United States)
OSTI ID:5643597
;
The reaction of neopentane with hydrogen over a Pt/..gamma..-Al/sub 2/O/sub 3/ catalyst is examined as a function of Pt-loading in the range of 0.48 to 12.3 ..mu..mol/m/sup 2/ (BET). It is found that the turnover frequency and the activation energy are not significantly different when the Pt changes from a dispersed phase to a particulate phase but the product distribution is affected. While the dispersed phase catalyzes only a stepwise hydrogenolysis to yield isobutane, propane, ethane, and methane, the particulate phase promotes mainly an isomerization to form isopentane which is then hydrogenolyzed to n-butane, isobutane, propane, ethane, and methane. A large increase of isomerization selectivity has been achieved by sintering the catalyst in H/sub 2/ at 500/sup 0/C or by increasing Pt concentration in the particulate phase. 4 figures, 3 tables.
Research Organization:
Ford Motor Co., Dearborn, MI
OSTI ID:
5643597
Journal Information:
J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 73:1; 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
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTANE
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
DATA
DISPERSIONS
ELEMENTS
ENERGY
ETHANE
EXPERIMENTAL DATA
FABRICATION
GAS CHROMATOGRAPHY
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
IONIZATION GAGES
ISOMERIZATION
KINETICS
LOW PRESSURE
MEASURING INSTRUMENTS
METALS
METHANE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
PRESSURE GAGES
PROPANE
QUANTITY RATIO
REACTION KINETICS
SEPARATION PROCESSES
SINTERING
SPECIFICITY
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENTS
VACUUM GAGES
YIELDS