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Effect of P Factor on Dissolution of Poplar Hemicellulose during the Hydrothermal Pretreatment Process
  
DOI：10.11980/j.issn.0254-508X.2018.08.001
Key Words:poplar  prehydrolysis  P factor  xylo-oligosaccharides
Fund Project:国家重点研发计划项目（2017YFB0307900）；国家自然科学基金（31470602，31500490，31670595，31770628）；泰山学者工程。
Author NameAffiliation
XU Feng State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
YANG Gui-hua* State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
JI Xing-xiang State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
WANG Qiang State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
DONG Ji-ran State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
CHEN Jia-chuan* State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology(Shandong Academy of Sciences）， Ji’nan， Shangdong Province， 250353 
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Abstract:Hydrothermal pretreatment of biomass before pulping can effectively extract hemicelluloses， and this is of great significance for high value utilization of biomass. In this work， in the process of hydrothermal pretreatment of poplar under different conditions， the dissolution of hemicelluloses， acid-soluble lignin， acetic acid and aldehydes change with the P factor were studied.The results indicated that the optimum range of P factor was from 685 to 1225， in this range， the hemicellulose in poplar could easily dissolve， and the total xylose dissolution rate was 51.8%. The contents of xylose， acid soluble lignin， acetic acid， furfural etc. in the hydrolysate were proportional to the increase of P factor， while the content of xylo-oligosaccharides was inversely proportional to the increase of P factor.When the P factor was 717， the content of xylo-oligosaccharides in hydrolysate reached a maximum of 10.24 g/L， the total xylose dissolution rate of the raw materials was 44.2%， and the contents of xylose， acetic acid， furfural and other non-carbohydrate substrates were low，this was benefit to the subsequent separation of xylose and xylo-oligosaccharides for producing functional products．
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