Isolation of high quality lignin as a by-product from ammonia percolation pretreatment of poplar wood

Bouxin, F. P., Jackson, S. D. and Jarvis, M. C. (2014) Isolation of high quality lignin as a by-product from ammonia percolation pretreatment of poplar wood. Bioresource Technology, 162, pp. 236-242. (doi: 10.1016/j.biortech.2014.03.082) (PMID:24755321)

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A two-step process combining percolation-mode ammonia pretreatment of poplar sawdust with mild organosolv purification of the extracted lignin produced high quality, high purity lignin in up to 31% yield and 50% recovery. The uncondensed fraction of the isolated lignin was up to 34%, close to that the native lignin (40%). Less lignin was recovered after pretreatment in batch mode, apparently due to condensation during the longer residence time of the solubilised lignin at elevated temperature. The lignin recovery was directly correlated with its molecular weight and its nitrogen content. Low nitrogen incorporation, observed at high ammonia concentration, may be explained by limited homolytic cleavage of -O-4 bonds. Ammonia concentrations from 15% to 25% (w/w) gave similar results in terms of lignin structure, yield and recovery.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bouxin, Dr Florent and Jarvis, Dr Michael and Jackson, Professor David
Authors: Bouxin, F. P., Jackson, S. D., and Jarvis, M. C.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Bioresource Technology
ISSN (Online):1873-2976
Copyright Holders:Copyright © 2014 Elsevier Ltd.
First Published:First published in Bioresource Technology 162:236-242
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
534161Fine chemicals from lignocellulosic fermentation residues using heterogeneous catalysisMichael JarvisBiotechnology and Biological Sciences Research Council (BBSRC)BB/I005528/1CHEM - CHEMISTRY