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Dilute acid hydrolysis of paper birch : kinetics studies of xylan and acetyl-group hydrolysisAuthor(s): Mark T. Maloney; Thomas W. Chapman; Andrew J. Baker
Source: Biotechnology and bioengineering. Vol. 27 (Mar. 1985): Pages 355-361
Publication Series: Miscellaneous Publication
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DescriptionBatch hydrolysis kinetics of paper birch (Betula papyrifera) xylan and its associated acetyl groups in dilute sulfuric acid have been measured for acid concentrations of between 0.04 and 0.18 M and temperatures of between 100 and 170°C. Only 5% of the cellulose was hydrolyzed for up to 85% xylan removal. Rate data were correlated well by a parallel reaction model based on the existence of reactive and resistant xylan portions. The resulting rate equation predicts the experimental xylan concentrations in the residue to within 10%. Hydrolysis of xylan-associated acetyl groups was found to occur at the same rate as that of xylan, except at 100°C. where acetyl is released preferentially. No effect of acid concentration on the rate of acetyl removal relative to that of xylan was evident.
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CitationMaloney, Mark T.; Chapman, Thomas W.; Baker, Andrew J. 1985. Dilute acid hydrolysis of paper birch : kinetics studies of xylan and acetyl-group hydrolysis. Biotechnology and bioengineering. Vol. 27 (Mar. 1985): Pages 355-361
KeywordsPaper birch, Betula papyrifera, dilute acid hydrolysis, batch hydrolysis kinetics, xylan, acetyl-group hydrolysis, hydrolysis
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