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Investigation of the alkaline hydrogen peroxide pretreatment: From cellulose saccharification to lignin isolation

Journal Article · · Industrial Crops and Products
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [1];  [4];  [2];  [5]
  1. Chinese Academy of Forestry (China)
  2. Chinese Academy of Forestry (China); Nanjing Forestry Univ. (China)
  3. Nanjing Forestry Univ. (China)
  4. Yibin Paper Industry Co., Ltd. (China)
  5. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)

Alkaline hydrogen peroxide (AHP) pretreatment, a green and effective technology for biomass fractionation, was studied to overcome the recalcitrance of bamboo for lignin isolation and facilitating enzymatic saccharification. In order to explore the impact of AHP pretreatment on the cellulose saccharification of bamboo, the glucan/xylan recovery, lignin removal, and structural properties of solid substrate were investigated in this research. AHP pretreatment at 90 °C for 60 min with 3.0 % H2O2 resulted in the maximum glucan/xylan hydrolysis yield reaching 90.62 % and 88.30 %, respectively. Specially, for the first time, the recovered lignin from the AHP liquid possesses up to 59.84/100Ar of β-O-4 linkages, abundant ferulic acid (FA), and p-coumarate (pCE) structures, as well as a homogeneous molecular structure with high purity (84.04%-96.20%) and preferable antioxidant activities (IC50: 0.015–0.018 mg/mL). Finally, these results provided theoretical support for the comprehensive valorization of lignocellulose, which is favorable for achieving viable biorefineries.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2406724
Journal Information:
Industrial Crops and Products, Journal Name: Industrial Crops and Products Vol. 214; ISSN 0926-6690
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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