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Glycerol hydrogenolysis on heterogeneous catalysts

Content Provider	Royal Society of Chemistry (RSC)
Author	Rosier, Cécile Gallezot, Pierre Chaminand, Julien Marion, Philippe Pinel, Catherine Djakovitch, L.aurent
Copyright Year	2004
Abstract	Aqueous solutions of glycerol were hydrogenolysed at 180 °C under 80 bar H2-pressure in the presence of supported metal catalysts in an attempt to selectively produce 1,2- and 1,3-propanediol. Catalysts (Cu, Pd, Rh), supports (ZnO, C, Al2O3), solvents (H2O, sulfolane, dioxane) and additives (H2WO4) were tested to improve reaction rate and selectivity to the target molecules. The best selectivity (100%) to 1,2-propanediol was obtained by hydrogenolysis of water solution of glycerol in the presence of CuO/ZnO catalysts. To improve the selectivity to 1,3-propanediol the reaction was conducted with rhodium catalysts with tungstic acid added to the reaction medium. The best result in terms of conversion and selectivity to 1,3-propanediol (1,3-PDO/1,2-PDO = 2) was obtained by operating in sulfolane. The presence of iron dissolved in the reaction medium was also beneficial for the selectivity to 1,3-PDO. A mechanism was proposed to account for the effect of these different parameters.
Starting Page	359
Ending Page	361
Page Count	3
File Format	HTM / HTML PDF
ISSN	14639262
Volume Number	6
Issue Number	8
Journal	Green Chemistry
DOI	10.1039/b407378a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Glycerol Catalyst support 3-Propanediol Water Sulfolane 4-Dioxane Reaction rate Hydrogenolysis Copper(II) oxide Rhodium Acid
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution

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