KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Performances of Supported Noble Metal Catalysts and Kinetics over Pd/ZrO2 for Methanol Decomposition
Choji FukuharaShinobu SekiguchiHideaki MutoAkira Igarashi
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1995 Volume 21 Issue 6 Pages 1002-1008

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Abstract

Decomposition of methanol has been studied over various noble metal and copper catalysts at temperatures from 300 to 450°C. Screening experiments showed that Rh, Pd, and Pt catalysts supported on ZrO2 had high activities and high selectivities for carbon monoxide and hydrogen. The Pd/ZrO2 catalyst was not deactivated with time on line.
From a kinetic study, it was found that the partial pressure dependency of the initial reaction rate on the Pd/ZrO2 catalyst was zero-th order with respect to methanol. This means that a methanol molecule is strongly adsorbed on the catalyst surface and the rate determining step involves the removal of hydrogen from an adsorbed methoxy group.
Further, the decomposition rate over the Pd/ZrO2 catalyst was increased by hydrogen and decreased by carbon monoxide.

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© by THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN
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