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

被引：34

作者：

Bouxin, Florent P. ^{[1
]}

Jackson, S. David ^{[1
]}

Jarvis, Michael C. ^{[1
]}

机构：

[1] Univ Glasgow, Sch Chem, Glasgow G12 8QQ, Lanark, Scotland

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 162卷

基金：

英国生物技术与生命科学研究理事会;

关键词：

Lignin; Poplar; Ammonia percolation; Uncondensed fraction; Nitrogen content; ENZYMATIC-HYDROLYSIS; TECHNICAL LIGNINS; AQUEOUS-AMMONIA; HYBRID POPLAR; CONVERSION; BIOMASS; IMPACT; DELIGNIFICATION;

D O I：

10.1016/j.biortech.2014.03.082

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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 beta-O-4 bonds. Ammonia concentrations from 15% to 25% ( w/w) gave similar results in terms of lignin structure, yield and recovery. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：236 / 242

页数：7