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• W2000458644 abstract "Linear alkanes having two to four carbon atoms react with H2 by hydrogenolysis, giving smaller alkanes, or in the case of n-butane also by isomerization to isobutane. The dependence of the rates on H2 pressure is described by rate equations derived from mechanisms involving a partially dehydrogenated reactive intermediate; the precise form of the equation depends on the number of H atoms (zero, one, or two) assumed to take part on the slow step. An equation in which one H atom is used has been applied to the results obtained with Ru, Rh, and Pt catalysts and provides values for the rate constant k and for the equilibrium constants for H2 chemisorption KH and alkane dehydrogenation KA. Both k and KA increase with temperature on Ru and Pt catalysts, leading respectively to values of the true activation energy Et of ∼40−80 kJ mol-1 and of enthalpy changes of 60−90 kJ mol-1. Deficiencies of such rate equations include failure to allow quantitatively for carbon deposition and the assumption that both reactants utilize the same sites. Possible modifications to meet these criticisms will, however, require more complex rate equations, from which significant numerical values of the constants may not be obtainable." @default.
• W2000458644 created "2016-06-24" @default.
• W2000458644 creator A5067071595 @default.
• W2000458644 date "1997-08-01" @default.
• W2000458644 modified "2023-10-12" @default.
• W2000458644 title "Kinetic Modeling of Metal-Catalyzed Reactions of Alkanes" @default.
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• W2000458644 doi "https://doi.org/10.1021/ie960671z" @default.
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