?Exploration of deep eutectic solvent-based biphasic system for furfural production and enhancing enzymatic hydrolysis: Chemical, topochemical, and morphological changes

被引:20
|
作者
Sun, Li-Li [1 ]
Yue, Zhuang [1 ]
Sun, Shao-Chao [1 ]
Sun, Shao-Ni [1 ]
Cao, Xue-Fei [1 ]
Yuan, Tong-Qi [1 ]
Wen, Jia-Long [1 ]
机构
[1] Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
Deep eutectic solvent-based biphasic system; Eucalyptus; Furfural; Enzymatic hydrolysis; Biorefinery; PRETREATMENT; LIGNIN; CONVERSION; BIOMASS; SACCHARIFICATION; DEPOLYMERIZATION; FRACTIONATION; EUCALYPTUS; XYLOSE; XYLAN;
D O I
10.1016/j.biortech.2022.127074
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Developing a biorefinery process for a highly integrated valorization and fractionation of lignocellulose is crucial for its utilization. Herein, a biphasic system comprising choline chloride/lactic acid and 2-methyltetrahydrofuran with Al-2(SO4)(3) and H2SO4 as catalysts was applied to pretreat Eucalyptus. Results showed that under the optimized conditions (150 ?, 30 min, 0.2 M Al-2(SO4)3, 0.075 M H2SO4), the furfural yield and enzymatic hydrolysis efficiency could reach 54.7% and 97.0%, respectively. The efficient cellulose conversion was attributed to remarkable removal of lignin (91.0%) and hemicelluloses (100.0%), thereby causing the disruption of cell wall structure and enhancement of cellulose accessibility. Meanwhile, confocal Raman microscope and atomic force microscope displayed that the pretreatment resulted in the decreasing intensities of carbohydrates and lignin different regions of cell walls, and exposing of the embedded microfibers from noncellulosic polymers. Overall, the deep eutectic solvent-based biphasic system displayed high performance for effective utilization of carbohydrate components in lignocellulose.
引用
收藏
页数:7
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