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Supported Pd catalysts for the hydrogenation of campholenic aldehyde: Influence of support and preparation method

Paper ID Volume ID Publish Year Pages File Format Full-Text
42538 45930 2009 8 PDF Available
Title
Supported Pd catalysts for the hydrogenation of campholenic aldehyde: Influence of support and preparation method
Abstract

The selective catalytic reduction of the unsaturated campholenic aldehyde to the corresponding unsaturated alcohol, naturanol, was investigated over 2 wt.% Pd supported on different metal oxides (MeOx = SiO2, TiO2, ZnO, Fe2O3, NiO, Co3O4). Pd/MeOx catalysts have been prepared by impregnation (series I) and coprecipitation (series CP) and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and temperature programmed reduction (TPR).Results obtained in the hydrogenation of campholenic aldehyde have shown that the activity and products distribution depend both on the nature of the support and the preparation method. Regarding the catalysts of series I, palladium supported on SiO2 and TiO2 resulted totally unselective towards formation of naturanol, but, when Pd was supported on reducible metal oxides (ZnO, Fe2O3, NiO, and Co3O4), the selectivity to naturanol strongly increases. Higher selectivity values to naturanol have been obtained on catalysts of the CP series. Among these latter, the Pd/Co3O4 catalyst resulted the most selective, with a yield to the unsaturated alcohol > 85%.On the basis of characterization and kinetic data, the role of the support and of the preparation method in the catalytic behaviour of Pd catalysts for the selective reduction of the carbonyl group is discussed.

Graphical abstractThe selective catalytic reduction of the unsaturated campholenic aldehyde to naturanol was investigated over 2 wt.% Pd supported on different metal oxides (MeOx = SiO2, TiO2, ZnO, Fe2O3, NiO, Co3O4). Results obtained have shown that the activity and products distribution depend both on the nature of the support and the preparation method. Pd/Co3O4 catalyst resulted the most selective, with a yield to the unsaturated alcohol > 85%.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Pd supported catalysts; Naturanol; Selective hydrogenation
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Supported Pd catalysts for the hydrogenation of campholenic aldehyde: Influence of support and preparation method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 356, Issue 2, 15 March 2009, Pages 113–120
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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