Volume 1 Issue 3
Sep.  2016
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Lignin extraction and recovery in hydrothermal pretreatment of bamboo

  • Corresponding author: Xin Zheng, 1497539296@qq.com
  • Fund Project:

    The authors acknowledge the support from National Natural Science Foundation of China (Grant No. 31500488 and 31270638), Natural Science Foundation of Fujian Province (Grant No. 2016H6004 and 2016J01089).

  • A significant amount of lignin and hemicellulose are dissolved in the hydrothermal treatment of biomass. The hemicellulose can be recovered and utilized for value-added products. The dissolved lignin can undergo depolymerization and condensation reactions, and interferes with the separation and purification process for hemicellulose recovery. This paper investigated the behavior of the lignin extracted from the hydrothermal pretreatment of bamboo and its contributions to the physical characteristics of the hydrolysate. It was found that the turbidity of the hydrolysate was strongly associated with the lignin fragments and suspended long chain hemicelluloses. As the lignin depolymerization and condensation reactions occurred simultaneously, the dissolved lignin fractions in the hydrolysate increased first and then decreased. The molecular weight (MW) of the dissolved lignin fragments ranged from 3342~5611 g/mol, with mainly guaiacyl (G) and syringyl (S) unit in the structure.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Lignin extraction and recovery in hydrothermal pretreatment of bamboo

    Corresponding author: Xin Zheng, 1497539296@qq.com
  • a. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China;
  • b. Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick, Canada
Fund Project:  The authors acknowledge the support from National Natural Science Foundation of China (Grant No. 31500488 and 31270638), Natural Science Foundation of Fujian Province (Grant No. 2016H6004 and 2016J01089).

Abstract: A significant amount of lignin and hemicellulose are dissolved in the hydrothermal treatment of biomass. The hemicellulose can be recovered and utilized for value-added products. The dissolved lignin can undergo depolymerization and condensation reactions, and interferes with the separation and purification process for hemicellulose recovery. This paper investigated the behavior of the lignin extracted from the hydrothermal pretreatment of bamboo and its contributions to the physical characteristics of the hydrolysate. It was found that the turbidity of the hydrolysate was strongly associated with the lignin fragments and suspended long chain hemicelluloses. As the lignin depolymerization and condensation reactions occurred simultaneously, the dissolved lignin fractions in the hydrolysate increased first and then decreased. The molecular weight (MW) of the dissolved lignin fragments ranged from 3342~5611 g/mol, with mainly guaiacyl (G) and syringyl (S) unit in the structure.

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