文献类型：期刊文献

英文题名：Effect of hemicellulose and its-derived products on the recycling and efficiency of biomass fractionation using lactic acid/choline chloride (DES)

作者：Zhang, Qing[1,2] Meng, Jiao[1] Tian, Qingwen[2,3,4,5] Zhang, Lili[1] Shen, Jing[2] Ni, Yonghao[2] Wang, Zhiguo[1]

第一作者：Zhang, Qing

通信作者：Zhang, LL[1];Wang, ZG[1];Ni, YH[2]

机构：[1]Nanjing Forestry Univ, Coll Light Ind & Food Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Peoples R China;[2]Univ New Brunswick, Limerick Pulp & Paper Ctr, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada;[3]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[4]Shandong Huatai Paper Co Ltd, Dongying 257335, Peoples R China;[5]Shandong Yellow Triangle Biotechnol Ind Res Inst C, Dongying 257335, Peoples R China

年份：2025

卷号：430

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20251618263149);Scopus(收录号：2-s2.0-105002749634);WOS:【SCI-EXPANDED(收录号:WOS:001476773200001)】；

基金：We are very grateful for the funding from 1) the National Natural Science Foundation of China (Grant No. 32171723/22408176) , 2) the project funding from the Natural Science Foundation of Jiangsu Prov-ince (Grant No. BK20240684) , 3) the University Science Research and Innovation Project of Jiangsu Province (Grant No. 16310515) , 4) the China Scholarship Council (File No. 202308320318) for its support. The technical services from the Advanced Analysis and Testing Center of Nanjing Forestry University are very much appreciated.

语种：英文

外文关键词：Deep eutectic solvent (DES); Fractionation efficiency; DES recycling and reuse; Hemicellulose degradation products; Lignocellulose deconstruction

摘要：The recyclability of lactic acid/choline chloride deep eutectic solvent (DES) in lignocellulose fractionation remains challenging. This study demonstrates that DES reuse reduces delignification efficiency, with a residual lignin content of 9.64% after three cycles, resulting in incomplete fiber separation. The molecular weight of dissolved lignin increased, and 2D HSQC NMR revealed reduced beta-O-4 cleavage. Accumulated dissolved hemicellulose and its degradation products (e.g., acetic acid, furfural) altered DES properties, increasing viscosity and reducing hydrogen bond basicity, which hindered mass transfer, lignin-carbohydrate complex dissociation, and lignin depolymerization. To address these limitations, activated carbon adsorption (boosting delignification degree to 77%, near fresh DES at 80%) and prehydrolysis (achieving 82% after three cycles vs. 90% for fresh DES) are proposed to remove hemicellulose and its byproducts, minimizing their impact on recycled DES. This study demonstrates the recyclability of DES and proposes two strategies that significantly improve it, ensuring sustainable and efficient biomass fractionation.