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Exploring the catalytic properties of supported palladium catalysts in the transfer hydrogenolysis of glycerol

Paper ID Volume ID Publish Year Pages File Format Full-Text
45704 46421 2015 11 PDF Available
Title
Exploring the catalytic properties of supported palladium catalysts in the transfer hydrogenolysis of glycerol
Abstract

•The transfer hydrogenolysis of glycerol is promoted by coprecipitated Pd-catalysts.•The reaction solvent (2-propanol) was used as hydrogen-donor.•Pd-Co and Pd-Fe ensembles have been identified as the active catalytic phases.•CTH mechanism involves the glycerol dehydration and subsequent hydrogenation.

The transfer hydrogenolysis of glycerol promoted by supported palladium catalysts is reported. The reactions were carried out under mild conditions (453 K and 5 bar of N2) in absence of added hydrogen by using the reaction solvent, 2-propanol, as hydrogen source. The catalytic results are interpreted in terms of metal (Pd)–metal (Co or Fe) interaction that modifies the electronic properties of palladium and affords bimetallic PdM sites (M = Co or Fe), thus enhancing the catalytic properties of the systems in the conversion of glycerol as well as in the selectivity to 1,2-propanediol and 1-propanol. The transfer hydrogenolysis mechanism is here elucidated and involves the glycerol dehydration to 1-hydroxyacetone and the subsequent hydrogenation of 1-hydroxyacetone to propylene glycol.

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Keywords
Catalytic transfer hydrogenolysis (CTH); Glycerol valorization; 1,2-Propanediol; Coprecipitated palladium catalysts; Strong metal support interaction
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Exploring the catalytic properties of supported palladium catalysts in the transfer hydrogenolysis of glycerol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 166–167, May 2015, Pages 121–131
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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