Welcome to Biomass Chemical Engineering,

Biomass Chemical Engineering ›› 2023, Vol. 57 ›› Issue (6): 47-55.doi: 10.3969/j.issn.1673-5854.2023.06.007

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A Review on Recent Advances in Biomass Liquefaction in Water Mixed Solvent Systems

Yan MA, Hongxiao WANG, Guodong FENG, Ziyang WU, Weihong TAN()   

  1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Jiangsu Co-innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China
  • Received:2022-09-23 Online:2023-11-30 Published:2023-11-24
  • Contact: Weihong TAN E-mail:tanweihong71@163.com

Abstract:

Solvent liquefaction was an effective process which could utilize biomass raw materials efficiently and comprehensively. Compared with water as a single solvent, the mixed solvent system could reduce the reaction temperature and pressure, improve the conversion of biomass, reduce the oxygen content in bio-oil, and increase the yield of the target product. This paper reviewed the common water mixed solvent systems in recent years, including the role of alcohol-water cosolvent, polar aprotic solvent-water system and ionic liquid-water system in the degradation process of lignocellulosic biomass, especially the application characteristics of ethanol-water cosolvent, tetrahydrofuran (THF)-water cosolvent and γ-valerolactone (GVL)-water cosolvent in biomass liquefaction. This paper also gave the shortage and suggestions of these solvents in biomass liquefaction field. Finally, based on the consideration of the economic value, recovery and safety performance of the solvent itself, it is pointed out that the development of low-cost, environment-friendly and sustainable liquefying solvents would be the key development direction in the future.

Key words: biomass, liquefaction, mixed solvent system, bio-oil

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