Dilute acid hydrolysis of paper birch: Kinetics studies of xylan and acetyl-group hydrolysis
Article first published online: 18 FEB 2004
Copyright © 1985 John Wiley & Sons, Inc.
Biotechnology and Bioengineering
Volume 27, Issue 3, pages 355–361, March 1985
How to Cite
Maloney, M. T., Chapman, T. W. and Baker, A. J. (1985), Dilute acid hydrolysis of paper birch: Kinetics studies of xylan and acetyl-group hydrolysis. Biotechnol. Bioeng., 27: 355–361. doi: 10.1002/bit.260270321
- Issue published online: 18 FEB 2004
- Article first published online: 18 FEB 2004
- Manuscript Accepted: 10 AUG 1984
Batch 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 0.18M 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.