采用酸性离子液体催化的含水醇溶液对木质纤维素生物质进行脱木质素：溶剂的比较研究。

Lignocellulosic biomass delignification using aqueous alcohol solutions with the catalysis of acidic ionic liquids: A comparison study of solvents.

机构信息

Key Laboratory of Bio-based Material Science and Technology of Ministry of Education of China, College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China; College of Forestry, Guangxi University, Nanning 530004, China.

Key Laboratory of Bio-based Material Science and Technology of Ministry of Education of China, College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.

出版信息

Bioresour Technol. 2018 Feb;249:969-975. doi: 10.1016/j.biortech.2017.10.089. Epub 2017 Oct 27.

DOI:10.1016/j.biortech.2017.10.089

PMID:29145124

Abstract

The exploration of effective deconstruction of biomass complex structures and mild fractionation into individual components is a profound challenge for the development of biorefinery. Herein, a biomass fractionation process, via treating biomass in various aqueous alcohol solutions with the catalysis of acidic ionic liquids 1-butyl-3-methylimidazolium hydrogen sulfate, was demonstrated to fractionate coir and poplar into cellulose materials with a lignin content as low as 0.95% and lignin with a delignification rate of up to 98%. The participation of acidic ionic liquids into the solvent system greatly multiplied the biomass fractionation efficiency. The analysis on effects of the chemical structure and solubility parameter of alcohols on the delignification efficiency provided a rational and meaningful way to predict and screen solvent for the biomass fractionation process. Lignin in the present study exhibited similar structure with milled wood lignin, and comparable molecular and thermal properties with the conventional organosolv lignin.

摘要

探索有效的生物质复杂结构解构和温和组分分离成单个组分，对于生物炼制的发展是一个巨大的挑战。本文中，通过在各种含水醇溶液中用酸性离子液体 1-丁基-3-甲基咪唑硫酸氢盐催化生物质，展示了一种生物质分离工艺，可以将椰子纤维和杨树分离成纤维素材料，其木质素含量低至 0.95%，木质素的脱木质素率高达 98%。酸性离子液体参与溶剂体系极大地提高了生物质分离效率。对醇的化学结构和溶解度参数对脱木质素效率的影响的分析，为预测和筛选生物质分离过程的溶剂提供了一种合理而有意义的方法。本研究中的木质素与磨木木质素具有相似的结构，并且与常规有机溶剂木质素具有可比的分子和热性能。