1987•Journal of CatalysisRequires access

Cooperative action of Pt/. gamma. -Al/sub 2/O/sub 3/ catalyst and. gamma. -Al/sub 2/O/sub 3/ diluent in the hydrogenation of benzene

S. Cęckiewicz, B. Delmon

Abstract

Benzene was hydrogenated with hydrogen in a flow reactor at 70-260/sup 0/C over mechanical mixtures of 0.6 wt% Pt/..gamma..-Al/sub 2/O/sub 3/ and ..gamma..-Al/sub 2/O/sub 3/ as catalyst. When the alumina-supported Pt was diluted with alumina in the ratio of 1:20, the specific activity of the catalyst increased about fourfold. The results suggest that benzene hydrogenation occurs on both Pt/..gamma..-Al/sub 2/O/sub 3/ and the diluent ..gamma..-Al/sub 2/O/sub 3/. The influence of the purity of reactants and ..gamma..-Al/sub 2/O/sub 3/ on the hydrogen spillover effects have been studied. ..gamma..-Al/sub 2/O/sub 3/ intentionally contaminated by Fe or coke gave lower conversions of benzene. Pretreatment with oxygen exerted a positive effect on the activity of catalysts.

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Key concepts: Catalysis, Chemistry, Benzene, Diluent, Hydrogen, Hydrogen spillover, Inorganic chemistry, Nuclear chemistry