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Title: Utilization of guaiacol-based deep eutectic solvent for achieving a sustainable biorefinery

Journal Article · · Bioresource Technology
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [2];  [5]; ORCiD logo [6];  [7]
  1. Jiangsu Key Laboratory of Biomass Energy and Materials, Nanjing (China); Nanjing Forestry Univ. (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Jiangsu Key Laboratory of Biomass Energy and Materials, Nanjing (China)
  3. Nanjing Forestry Univ. (China)
  4. State Univ. of New York (SUNY), Syracuse, NY (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)
  7. Guangxi Univ., Nanning (China)

This study proposed a renewable deep eutectic solvent (DES) pretreatment using lignin-derived guaiacol as the hydrogen bond donor. The DES showed excellent biomass fractionation efficiency after the incorporation of trace AlCl3 as the reinforcer, which removed 79.1 % lignin while preserving more than 90 % glucan. The pretreated bamboo exhibited 96.2 % glucan enzymatic hydrolysis yield at only 110 °C. The physicochemical properties of the pretreated solids were comprehensively investigated to explain how the DES fractionation overcame the biomass recalcitrance. The regenerated lignin from the DES pretreatment was also analyzed, which revealed that lignin β-O-4 bond was significantly cleaved. In conclusion, this guaiacol-based DES could greatly contribute to establish a closed-loop biorefinery sequence with high lignin fractionation efficiency and great solvent recyclability.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; Jiangsu Province Key Laboratory of Biomass Engineering and Materials; Guangxi University; University of Tennessee; China Association for Science and Technology (CAST)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1886483
Journal Information:
Bioresource Technology, Journal Name: Bioresource Technology Vol. 362; ISSN 0960-8524
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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