Lignin extraction and recovery in hydrothermal pretreatment of bamboo  

作　　者：Xin Zheng Xiaojuan Ma Lihui Chen Liulian Huang Shilin Cao Joseph Nasrallah 

机构地区：[1]College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,P.R.China [2]Department of Chemical Engineering,University of New Brunswick,Fredericton,New Brunswick,Canada

出　　处：《Journal of Bioresources and Bioproducts》2016年第3期145-151,共7页生物质资源与工程（英文）

基　　金：support from National Natural Science Foundation of China (Grant No.31500488 and 31270638);Natural Science Foundation of Fujian Province (Grant No.2016H6004 and 2016J01089).

摘　　要：A significant amount of lignin and hemicellulose are dissolved in the hydrothermal treatment of biomass.The hemicellulose can be recovered and utilized for value-added products.The dissolved lignin can undergo depolymerization and condensation reactions,and interferes with the separation and purification process for hemicellulose recovery.This paper investigated the behavior of the lignin extracted from the hydrothermal pretreatment of bamboo and its contributions to the physical characteristics of the hydrolysate.It was found that the turbidity of the hydrolysate was strongly associated with the lignin fragments and suspended long chain hemicelluloses.As the lignin depolymerization and condensation reactions occurred simultaneously,the dissolved lignin fractions in the hydrolysate increased first and then decreased.The molecular weight(MW)of the dissolved lignin fragments ranged from 3342~5611 g/mol,with mainly guaiacyl(G)and syringyl(S)unit in the structure.

关 键 词：BAMBOO hydrothermal pretreatment LIGNIN GPC NMR 

分 类 号：O62[理学—有机化学]