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Effective biomass fractionation and lignin stabilization using a diol DES system

Journal Article · · Chemical Engineering Journal
 [1];  [2];  [1];  [1];  [3];  [4];  [5];  [6];  [7]
  1. Chinese Academy of Forestry, Nanjing (China)
  2. Chinese Academy of Forestry, Nanjing (China); Nanjing Forestry Univ. (China); Univ. of Tennessee, Knoxville, TN (United States)
  3. Nanjing Forestry Univ. (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. State Univ. of New York (SUNY), Syracuse, NY (United States)
  6. Chinese Academy of Forestry, Nanjing (China); Nanjing Forestry Univ. (China)
  7. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
A sustainable and renewable biorefinery will increase the economic viability of lignocellulose-derived products. In this study, a diol-based deep eutectic solvent (DES) was developed to reduce the recalcitrance of bamboo, facilitate saccharification and valorize the lignin fraction. The DES pretreatment dramatically enhanced glucan digestibility by the effective removal of lignin (as high as 85.45%) and xylan (91.12%). Notably, the recovered lignin from DES pretreatment was protected during the fractionation, showing well-preserved β-O-4 structures (31.82%–59.06%). The mechanism of lignin protection was analyzed to be accomplished by incorporating the diol hydroxyl functional groups into the α position of the lignin β-O-4 structure via etherification. This work highlighted that diol DES is a promising pretreatment solvent to valorize both cellulose and lignin fractions with high enzymatic hydrolysis yield and high-quality lignin co-product.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; Jiangsu Province Key Laboratory of Biomass Energy and Materials; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1867769
Journal Information:
Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Journal Issue: 1 Vol. 443; ISSN 1385-8947
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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