Two-step consecutive reaction model of biomass thermal decomposition by DSC

被引：16
作者：
Chen Hai-Xiang [1 ]
Liu Nai-An [1 ]
Fan Wei-Cheng [1 ]
机构：
[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2006年 / 22卷 / 07期
基金：
中国国家自然科学基金;
关键词：
biomass; thermal decomposition; kinetic model; DSC;
D O I：
10.1016/S1872-1508(06)60031-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The thermal decomposition of one kind of biomass in air has been investigated by differential scanning calorimetry (DSC) analyzer. The results indicate that the heating process of samples from ambient temperature to 923 K at low heating rates show two obvious exothermic peaks. According to the decomposition mechanism, the first exothermic step is attributed to oxidative degradation of hemicellulose and cellulose, and the second exothermic step is attributed to lignin degradation and char oxidation. The reaction model of the studied biomass thermal decomposition has been studied by iso-conversional methods and optimization computation. The results suggest that the two-step consecutive reaction model is suitable to describe the exotherm of biomass thermal decomposition in air.
引用
收藏
页码：786 / 790
页数：5
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