Supported Ru catalysts: a study of the influence of supports, promoters and preparative variables on the catalytic activity and selectivity |
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Authors: | Lucio Ronchin and Luigi Toniolo |
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Institution: | (1) Department of Chemistry, University of Venice, Dorsoduro 2137, 30123 Venezia, Italy |
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Abstract: | The influence of some preparative variables, of the metal loading and of the support on the activity of Ru catalysts for the
selective hydrogenation of benzene to cyclohexene has been studied. The reaction has been carried out in a tetraphase reactor
(in the presence of an aqueous solution of ZnSO4) at 423 K and 5 MPa pressure. The effect of hydrogen diffusion on the reaction kinetics and on cyclohexene selectivity was
studied. The hydrophilicity of the support was related to the observed selectivity. Hydrogen chemisorption indicates that
the catalyst activity is not influenced by the Ru dispersion, but mainly by the weakly chemisorbed species on the catalyst
surface.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | Ru catalyst preparations Ru chemisorption Benzene selective hydrogenation |
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