Ethane hydrogenolysis on supported Pt and Ni catalysts

Dumesic, J. A., Cortright, R. D., Watwe, R., Spiewak, B. E., Podkolzin, S.

Book of Abstracts, 214-th ACS National Meeting, Las Vegas, NV, September 7-11 (1997) PETR-096.

Abstract

     Ethane hydrogenolysis has been an informative reaction to probe the properties of supported metal catalysts, e.g., see various papers by Sinfelt and co-workers. We have combined reaction kinetic studies of ethane hydrogenolysis with microcalorimetric measurements and quantum chem. calcns. to compare silica-supported Pt and Ni catalysts. The hydrogenolysis reaction exhibits more pos. ethane orders and less neg. hydrogen orders over supported Ni compared to Pt, and these reaction orders are strongly dependent on the reaction temp. and the partial pressures of reactants. Results of microcalorimetric investigations and quantum chem. calculations. show similar heats for the adsorption of ethylene, acetylene, and hydrogen on supported Ni and Pt, whereas C-C bond rupture is more favorable through an adsorbed C₂H₄ intermediate on Ni, compared to an adsorbed C₂H₂ intermediate on Pt.

Address:

Department of Chemical Engineering, University of Wisconsin, Madison, WI 53706, USA.

Publisher:

American Chemical Society, Washington, D. C.

CODEN: 64RNAO Conference. 

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