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Vapor-phase reaction of polyols over copper catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42911 45946 2008 6 PDF Available
Title
Vapor-phase reaction of polyols over copper catalysts
Abstract

The vapor-phase reaction of triols and diols was performed over copper metal catalysts. Triols, such as 1,2,3-propanetriol (glycerol) and 1,2,3- and 1,2,4-butanetriols, were dehydrated to afford corresponding hydroxyketones, while 1,2-propanediol was dehydrogenated to form hydroxyacetone. Supported copper as well as pure copper metal was an effective catalyst for the dehydration of glycerol to produce hydroxyacetone under inert conditions. In hydrogen flow, however, copper catalyzed the hydrogenation of hydroxyacetone as well as hydrogenolysis to produce ethylene glycol. Alumina-supported copper showed the highest catalytic activity with hydroxyacetone selectivity of >90 mol% at ambient pressure of nitrogen and 250 °C. Copper metal provides an active site for the dehydration of glycerol. We propose a reaction mechanism for the dehydration of glycerol to form hydroxyacetone.

Graphical abstractVapor-phase reaction of triols and diols was performed over copper metal catalysts. Triols, such as glycerol, and 1,2,3- and 1,2,4-butanetriols, were dehydrated to form corresponding hydroxyketones. Supported copper as well as pure copper metal was an effective catalyst for the dehydration: alumina-supported copper showed the highest catalytic activity with hydroxyacetone selectivity of >90 mol% at ambient pressure of nitrogen and 250 °C.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Copper; Glycerol; Dehydration; Hydroxyacetone
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 347, Issue 2, 15 September 2008, Pages 186–191
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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