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Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
55337 47048 2012 8 PDF Available
Title
Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst
Abstract

The hydrolytic hydrogenation of hemicellulose arabinogalactan, into sugars, sugar alcohols and furfurals was carried out in a batch reactor using modified mesoporous MCM-48 material incorporated with ruthenium metal into the framework. The bi-functional catalytic materials, MCM-48 and Ru–MCM-48 were synthesized, characterized and investigated in the title reaction at total pressure of 20 bar hydrogen, using an initial arabinogalactan concentration of 0.4 wt%, at 458 K. The transformation of the hemicellulose consists of arabinogalactan hydrolysis to the monosaccharides, l-arabinose and d-galactose followed by the subsequent hydrogenation to sugar alcohols, arabitol and galactitol or dehydration of the monomers to furfural and 5-hydroxymethylfurfural. The yields of the main products, i.e. sugars, sugar alcohols and furfurals were varied depending on the strength of the acid sites and the presence of metal in the structure of the ruthenium modified catalyst. Ru–MCM-48 displayed high catalytic activity and the sugar alcohols were obtained selectively from the hemicellulose. The catalytic performance of the mesoporous MCM-48 catalysts with respect to the catalyst structure, acidity and presence of the metal was evaluated.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (86 K)Download as PowerPoint slideHighlights► Hydrolytic hydrogenation of arabinogalactan was done. ► H–MCM-48 and metal modified mesoporous Ru–MCM-48 were tested. ► A one-pot transformation of hemicellulose over bi-functional catalysts. ► Selective formation of arabitol and galactitol.

Keywords
Hemicellulose; Arabinogalactan; Hydrolysis; Hydrogenation; Dehydration; Heterogeneous catalysts; Ruthenium; MCM-48
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Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 196, Issue 1, 30 November 2012, Pages 26–33
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us