文献类型：期刊文献

英文题名：Deep Eutectic Solvents Recycling for Efficient and Sustainable Lignocellulosic Biomass Processing and the Impact of Recycling on Resultant Lignin and Cellulose Products

作者：Zhang, Qing[1,2] Zhu, Enqing[1] Zhang, Chi[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]

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：13

期号：35

起止页码：14400-14410

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20255019697112);Scopus(收录号：2-s2.0-105024379716);WOS:【SCI-EXPANDED(收录号:WOS:001558772600001)】；

基金：We are very grateful for the funding from 1) the National Natural Science Foundation of China (Grant No. 32471808), 2) the Natural Science Foundation of Jiangsu Province (Grant No. BK20240684), 3) the University Science Research and Innovation Project of Jiangsu Province (Grant No. 16310515), and 4) the China Scholarship Council (File No. 202308320318) for their 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; solvent recycling; lignocellulosefractionation; biomass processing; sustainable biorefinery

摘要：Deep eutectic solvents (DESs) present a promising pathway for sustainable lignocellulosic biomass fractionation, yet challenges such as solvent recyclability and maintaining product quality over repeated cycles persist, which is largely caused by hemicelluloses. A lactic acid/choline chloride (LA/ChCl) DES was employed to fractionate acid-hydrolyzed poplar chip biomass. After removing similar to 96% of hemicellulose via acid hydrolysis pretreatment, the fractionation using fresh DES achieved a delignification degree of 90%, yielding cellulose-rich pulp over 90%. The DES was recycled up to five times, maintaining over 90% recovery in each cycle. However, the delignification degree decreased to 76% after five cycles. Supplementing fresh DES restored the delignification degree to 78%, while activated carbon adsorption further improved it to 88%. Importantly, structural analysis confirmed minimal degradation of DES, and the recycling process maintained the quality of the fractionated products. The lignin fraction exhibited high purity (>85%), stable molecular weight (similar to 7000 g/mol), low polydispersity index (similar to 1.70), and the cellulose fraction displayed efficient fiber separation while maintaining its natural crystalline structure (crystallinity index similar to 80%). This work provides new process concepts for DES fractionation of biomass, offering a scalable and environmentally sustainable solution for lignocellulosic biomass processing within biorefinery frameworks.