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Cellobiose hydrolysis using organic–inorganic hybrid mesoporous silica catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
44232 46010 2007 8 PDF Available
Title
Cellobiose hydrolysis using organic–inorganic hybrid mesoporous silica catalysts
Abstract

The hydrolysis of cellobiose, a model system for oligosaccharide hydrolysis, was examined using organic–inorganic hybrid mesoporous catalysts. The activity of butylcarboxylic acid, propylsulfonic acid and arenesulfonic acid functionalized silicas were determined for cellobiose hydrolysis as well as glucose degradation. The hydrolysis rate constants for the three catalyst types were proportional to their pH values at ambient temperature and the apparent activation energies for the hydrolysis reaction were the same suggesting that hydrated protons were the catalytic species in the reaction. The apparent activation energy for glucose degradation was the same for each of the catalysts and was lower than that found for the hydrolysis reaction. As such, higher reaction temperature improved the selectivity of the hydrolysis reaction relative to the degradation reaction. The desirability of high reaction temperatures made the organic–inorganic hybrid materials preferable to polymer-based catalysts.

Graphical abstractThe hydrolysis of cellobiose, a model system for oligosaccharide hydrolysis, was examined using organic–inorganic hybrid mesoporous catalysts. The rate constants and apparent activation energies for three organic acid catalytic species in the hydrolysis reaction were determined. The kinetic parameters were also determined for the subsequent glucose degradation reaction. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Cellobiose; Disaccharide hydrolysis; Organic–inorganic hybrid catalysts; Mesoporous silica; Corn fiber
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Cellobiose hydrolysis using organic–inorganic hybrid mesoporous silica catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 327, Issue 1, 31 July 2007, Pages 44–51
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