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Reaction Kinetics of Xylose from Eucalyptus Hot Water Prehydrolysis
  
DOI:10.11980/j.issn.0254-508X.2019.06.003
Key Words:eucalyptus  hot-water prehydrolysis  hemicellulose  reaction kinetics
Fund Project:国家重点研发计划项目课题“制浆水解液半纤维素提取技术及木糖制备产业化示范”(2017YFB0307904)。
Author NameAffiliation
LI Dan1 1. China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
2. National Engineering Lab for Pulp and Paper, Beijing, 100102 
SU Zhenhua1,2,* 1. China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
2. National Engineering Lab for Pulp and Paper, Beijing, 100102 
CAO Chunyu1,2 1. China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
2. National Engineering Lab for Pulp and Paper, Beijing, 100102 
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Abstract:In this study, the reaction kinetics of xylose hydrolysate from eucalyptus autohydrolysis was investigated through analyzing mass concentrations of xylose and its degradation product furfural under different prehydrolysis conditions. The evaluated activation energy of xylose was 72.62 kJ/mol according to the established reaction kinetic equation. The optimization of experimental parameters including wood to liquor ratio, hydrolysis temperature, and time was accomplished to determine the optimized hydrolysis conditions as follows: wood to liquor ratio 1∶8, hydrolysis temperature 170℃, time 105 min. Under this condition, the mass concentrations of xylose and furfural in the hydrolysate were 7.97 g/L and 1.74 g/L respectively.
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