Study on degradation kinetics of hemicellulose in wheat straw hydrothermal pretreatment

被引：0

作者：

Zhang H. ^{[1
]}

Fu Q. ^{[1
,2
]}

Liao Q. ^{[1
,2
]}

Xia A. ^{[1
,2
]}

Huang Y. ^{[1
,2
]}

Zhu X. ^{[1
,2
]}

机构：

[1] Institute of Engineering Thermophysics, Chongqing University, Chongqing

[2] Key Laboratory of Low-Grade Energy Utilization Technologies & Systems, MOE, Chongqing University, Chongqing

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 07期

关键词：

Furfural; Hemicellulose; Hydrothermal pretreatment; Wheat straw; Xylooligosaccharides; Xylose;

D O I：

10.11949/0438-1157.20200053

中图分类号：

学科分类号：

摘要：

Hydrothermal pretreatment is one key process for efficient energy conversion of lignocellulose raw materials. However, the reaction path and reaction mechanism of hydrothermal pretreatment using wheat straw as raw materials are still insufficiently studied, limiting the optimization of the pretreatment process and the real-world application. In this paper, wheat straw was used as the research object, and the reaction kinetics of hydrothermal pretreatment of lignocellulose was experimentally studied. It was found that the degradation of hemicellulose to xylooligosaccharide, xylose, and furfural is the main degradation process in the hydrothermal pretreatment process. In addition, the concentration of xylooligosaccharide and xylose in the hydrolysate decreased with the increase of pretreatment temperature, while the concentration of furfural increased. The concentration of xylooligosaccharide and xylose in the hydrolysate first increased and then decreased with the incubation time, and the concentration of furfural tended to be stable with the incubation time. According to the experimental results, a new reaction path was proposed, and the kinetic rate constant and the activation energy of the reaction were obtained. The obtained kinetic model can well explain the changes in the concentration of the reactants, which was in a good agreement with the experimental data. This model can provide guidance for the design of wheat straw hydrolysis pretreatment system. © All Right Reserved.

引用

页码：3098 / 3105

页数：7

共 33 条

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