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A high-solid DES pretreatment using never-dried biomass as the starting material: towards high-quality lignin fractionation

Journal Article · · Green Chemistry
DOI:https://doi.org/10.1039/d2gc04595h· OSTI ID:1928910
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [2];  [6]
  1. Chinese Academy of Forestry, Nanjing (China).
  2. Chinese Academy of Forestry, Nanjing (China)
  3. Nanjing Forestry Univ. (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. State Univ. of New York (SUNY), Syracuse, NY (United States). College of Environmental Science and Forestry
  6. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)
This study investigated a high-solid diol deep eutectic solvent (DES) pretreatment using a wet substrate as the starting material. This pretreatment led to a remarkable glucan saccharification of 94.8% with efficient lignin and xylan removal (as high as 63.1% and 73.0%, respectively). Here the chemical structures of the substrates were analyzed comprehensively to reveal the impact of the pretreatment. In addition, over 90% of the removed lignin was recovered from the pretreated liquid, which exhibited a well-preserved β-O-4 structure (46–56/100Ar). The protection mechanism of our DES was investigated by 2D HSQC NMR, GPC, and 31P NMR analysis. This study emphasized that diol-based DES pretreatment of undried lignocellulosic biomass at a high-solid loading can significantly utilize both carbohydrates and lignin fractions with high saccharification yields and high-quality lignin as a co-product.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
Jiangsu Province Key Laboratory of Biomass Energy and Materials; National Natural Science Foundation for Youth; USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1928910
Journal Information:
Green Chemistry, Journal Name: Green Chemistry Journal Issue: 4 Vol. 25; ISSN 1463-9262
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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