Silica-supported copper-iron catalysts for hydrogenolysis reactions characterized by Mössbauer spectroscopy |
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| Authors: | J. van Beijnum A. A. van der Horst J. W. Geus A. M. van der Kraan |
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| Affiliation: | (1) Interfacultair Reactor Instituut, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands;(2) Department of Inorganic Chemistry, University of Utrecht, P.O. Box 80083, 3508 TB Utrecht, The Netherlands |
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| Abstract: | A special preparation procedure has been developed to provide a very uniform distribution of iron throughout the copper precursor supported on silica. The best performance for hydrogenolysis of methyl acetate has been obtained for a catalyst prepared in a one-step procedure, in which iron(III) and copper(II) were injected together into a suspension of silica at a constant pH level. It is found that the main part of the iron has been incorporated into the formed copper hydrosilicate. After reduction and under reaction conditions, only about 6% of the iron atoms are in the Fe0 state. This Fe0 is expected to be responsible for the enhancement of the catalyst activity in hydrogenation and hydrogenolysis reactions. |
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