Title: Hydrogenolysis of saturated hydrocarbons II. Comparative hydrogenolysis of some aliphatic light hydrocarbons on platinum-alumina
Abstract: Kinetics of catalytic hydrogenolysis of ethane, propane, butane, isobutane, neopentane and isopentane on PtAl2O3 have been investigated in a flow reactor at atmospheric pressure. These hydrocarbons are arranged according to increased rates of hydrogenolysis at 300 °C in the series: ethane, propane, neopentane, isobutane, butane and isopentane. The kinetic orders and apparent activation energies of the breaking of different types of CC bonds have been determined. The exponents of hydrocarbon partial pressure are always positive, while the exponent of hydrogen pressure can be positive or negative, and in some cases the rate is maximum for a certain hydrogen pressure. All these observations are consistent with the kinetic scheme proposed by Cimino, Boudart and Taylor [J. Phys. Chem.58, 596 (1954)]. In terms of these hypotheses an extensively dehydrogenated surface species has been found for all hydrocarbons investigated. The rate constant of the rupture of the carbon-carbon bond is not much changed with the hydrocarbon. On the other hand, the adsorption equilibrium is greatly influenced by the structure of the hydrocarbons: the adsorption equilibrium constant increases with the molecular weight in a homologous series, but for an equal number of carbon atoms, it decreases when branching increases.
Publication Year: 1976
Publication Date: 1976-07-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 55
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot