Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China; Shandong Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China.
Bioresour Technol. 2018 Oct;265:334-339. doi: 10.1016/j.biortech.2018.06.027. Epub 2018 Jun 12.
In this study, a novel biomass pretreatment process using three kinds of deep eutectic solvents (DESs) was developed to improve saccharification efficiency and lignin valorization. The major components of xylose residue including cellulose and lignin fractions were released, recovered and utilized. Pretreatment with betaine/lactic acid system at 120 °C for 2 h was found to be the optimal conditions with prominently increased enzymatic digestibility (from 55.3% to 96.8%). The efficient conversion was mainly ascribed to the significant delignification efficiency of 81.6% after betaine/lactic acid pretreatment, which caused incompact structure and corrosive surface of treated xylose residue. The recoverable lignin had high purity, low molecular weight (630-2040 g/mol) and polydispersity (1.07-1.76). Based on the comprehensive analysis, the one-pot DESs system provides us a facile and effective approach for whole components valorization of lignocellulosic materials.
在这项研究中，开发了一种使用三种深共熔溶剂（DESs）的新型生物质预处理工艺，以提高糖化效率和木质素的增值利用。木糖残渣的主要成分包括纤维素和木质素部分被释放、回收和利用。在 120°C 下用甜菜碱/乳酸体系预处理 2 小时被发现是最佳条件，酶解可显著提高（从 55.3%提高到 96.8%）。高效转化主要归因于甜菜碱/乳酸预处理后的脱木质素效率显著，达到 81.6%，导致处理后的木糖残渣结构不紧密，表面腐蚀性增强。可回收的木质素具有高纯度、低分子量（630-2040g/mol）和多分散性（1.07-1.76）。基于综合分析，一锅法 DESs 体系为木质纤维素材料的全组分增值利用提供了一种简便有效的方法。
