Carbon Supported Catalysts in
Selective Oxidation & Reduction

By Edwin Crezee
December 2003
Delft University Press
ISBN: 90-407-2444-X
185 pages, Illustrated, 6 " x 9 "
$57.50 Paper Original


This is a Ph.D. dissertation. The use of carbon as a support for liquid phase catalysts is well established for a wide variety of reactions and carbon powders are the preferred support for the majority of the slurry phase processes. The benefits of the carbon materials derive from the nature of the metal support interactions and the resulting character of the catalytic sites, the surface chemistry and its impact on the wetting of the support by the liquid phases and the inherent porosity of the carbons in highly acidic or basic media are also of major importance in some classes of reactions.

The use of synthetic carbons enables the production of a wide variety of physical forms from small spray dried particles to large monolithic structures. Into these macroforms a wide range of macro and meso pore structures can be built, allowing establishment of the precise impact of the macro-, meso- and microstructure precisely to the reaction environment required. In this research we have opted to investigate the effects of pore structure as well as carbon surface chemistry on a relatively new type of reaction with considerable commercial potential - air oxidation reaction of cyclohexanone. For oxidation reactions air is the ultimate "green" reagent. The second reaction that will be investigated in this research is the liquid phase hydrogenation of D-glucose to D-sorbitol, in which the conventional Raney-type nickel catalyst is replaced by a carbon supported ruthenium catalyst.

Contents include: (1) Introduction, (2) Preparation, characterization and testing of synthetic carbon-coated monolithic platinum catalysts, (3) Effects of texture, surface chemistry and platinum on the selective oxidation of cyclohexanone over carbon supports, (4) Dispersion and distribution of ruthenium on carbon-coated ceramic monolithic catalysts prepared by impregnation, (5) Selective hydrogenation of D-glucose over ruthenium catalysts - Influence of type of support and catalyst precursor, (6) Three-phase hydrogenation of D-glucose over a carbon supported ruthenium catalyst - Mass transfer & Kinetics, (7) The role of the active phase of Raney-type Ni catalysts in selective hydrogenation of D-glucose to D-sorbitol, Summary and Evaluation.

Chemistry

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