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Optimization and Characterization of Deconstructing Poplar Fiber by Hydrothermal Coupling with Dilute Acetic Acid
Received:January 22, 2022  
DOI：10.11980/j.issn.0254-508X.2022.07.003
Key Words:hydrothermal pretreatment  acetic acid  poplar  xylose  cellulose deconstruction
Author NameAffiliationPostcode
MA Xinyu School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
ZHAN Peng School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
QING Yan School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
LIU Jin School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
HUANG Yilei* School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
YU Zhiqiang School of Material Science and Engineering， Hu’nan International Joint Lab of Woody Biomass Conversion， Central South University of Forestry and Technology， Changsha， Hu’nan Province， 410004 410004
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Abstract:The fast-growing poplar was deconstructed by hydrothermal coupling dilute acetic acid pretreatment technology， and the effects of acetic acid concentration， solid-to-liquid ratio， temperature and reaction time on the removal rate of xylose and the cellulose retention yield in poplar were studied. The results showed that under the conditions of acetic concentration of 0.5%， solid-liquid ratio of 1∶20， temperature of 170℃ and reaction time of 30 min， the removal rate of xylose was 92.9%， and the cellulose retention yield was 94.0%. Through the analysis of the structure and composition of the hydrothermal residue and pretreatment liquid， it was shown that the hydrothermal coupling dilute acetic acid pretreatment was a mild method， which mainly removed the xylose of hemicellulose in poplar fiber， most of which was transformed into xylo-oligosaccharide， and simultaneously had less damage to cellulose and lignin， thereby protecting cellulose and improving cellulase accessibility.
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