Efficient Cleavage of Lignin-Carbohydrate Complexes and Ultrafast Extraction of Lignin Oligomers from Wood Biomass by Microwave-Assisted Treatment with Deep Eutectic Solvent

Release time:2017-01-05 Hits:

Impact Factor:7.5

DOI number:10.1002/cssc.201700552

Affiliation of Author(s):东北林业大学

Journal:ChemSusChem

Abstract:Lignocellulosic biomass is an abundant and renewable resource for the production of biobased value-added fuels, chemicals, and materials, but its effective exploitation by an energy-efficient and environmentally friendly strategy remains a challenge. Herein, a facile approach for efficiently cleaving lignin–carbohydrate complexes and ultrafast fractionation of components from wood by microwave-assisted treatment with deep eutectic solvent is reported. The solvent was composed of sustainable choline chloride and oxalic acid dihydrate, and showed a hydrogen-bond acidity of 1.31. Efficient fractionation of lignocellulose with the solvent was realized by heating at 80 °C under 800 W microwave irradiation for 3 min. The extracted lignin showed a low molecular weight of 913, a low polydispersity of 1.25, and consisted of lignin oligomers with high purity (ca. 96 %), and thus shows potential in downstream production of aromatic chemicals. The other dissolved matter mainly comprised glucose, xylose, and hydroxymethylfurfural. The undissolved material was cellulose with crystal I structure and a crystallinity of approximately 75 %, which can be used for fabricating nanocellulose. Therefore, this work promotes an ultrafast lignin-first biorefinery approach while simultaneously keeping the undissolved cellulose available for further utilization. This work is expected to contribute to improving the economics of overall biorefining of lignocellulosic biomass.

Co-author:Wenshuai Chen,Qinqin Xia,Bingtuo Guo,Qingwen Wang,Shouxin Liu,Yixing Liu,Jian Li

First Author:Yongzhuang Liu

Indexed by:Journal paper

Correspondence Author:Haipeng Yu

Document Type:J

Volume:10

Issue:8

Page Number:1692-1700

Translation or Not:no

Date of Publication:2017-01-01

Included Journals:SCI

Links to published journals:https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cssc.201601795