Kinetics and mechanism of ethane hydrogenolysis on silica-supported platinum and platinum-iron catalysts

Journal Article · Thu Apr 01 04:00:00 EST 1982 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(82)90027-6· OSTI ID:5385279

Gudkov, B S; Guczi, L; Tetenyi, P

A kinetic analysis of ethane hydrogenolysis has been carried out on Pt/SiO/sub 2/ and PtFe/SiO/sub 2/ catalysts with a wide range of concentration of the components, and with an excess of ethane. With the help of the theory of stationary reactions on heterogeneous surfaces, kinetic equations were obtained describing the reaction rate both in excess hydrogen and excess ethane which are in full agreement with the experimental observations. On platinum in excess hydrogen the rate of hydrogenolysis is determined by the C-C bond rupture of ethane adsorbed in a mildly dissociated C/sub 2/H/sub x/ form, while in excess hydrocarbon it is determined by the C-C bond rupture of ethane adsorbed in the deeply dissociated form of C/sub 2/H/sub 2/. The reaction rate passes through a maximum vs ethane pressure at constant hydrogen pressure and vice versa. The formal reaction order in hydrogen and hydrocarbon can be either positive or negative depending on the conditions; the formal power-rate equations may be considered as approximations of the more complicated equations presented in this work. 3 figures, 5 tables.

• Research Organization: Hungarian Academy of Sciences, Budapest
• OSTI ID: 5385279
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 74:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

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10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DISPERSIONS
ELEMENTS
ETHANE
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
IRON
KINETICS
METALS
METHANE
MINERALS
MIXTURES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
REACTION INTERMEDIATES
REACTION KINETICS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
YIELDS