中文摘要：

采用热重分析法考察了生物质中三种主要成分纤维素、半纤维素和木质素的热解反应行为,以Coats-Redfern积分法对实验数据进行动力学解析,建立了该三组分热解反应的动力学模型.结果表明,分子结构上的不同使得该三组分的热解特性存在明显差异;在所考察的温区内纤维素的失重量约为86%,半纤维素模型化合物木聚糖的失重量为69%左右,而木质素的失重量仅为51%;热解反应深度按照纤维素、木聚糖和木质素的顺序依次降低;木质素和木聚糖的热解反应均可以用两个分段二级动力学方程来描述,但纤维素在低温区和高温区分别遵循一级和二级动力学规律.

英文摘要：

The pyrolysis characteristics of three main components of biomass, namely cellulose, xylan hemicellulose and lignin have been investigated by means of therrnogravimetric analysis. Models of their pyrolysis kinetics were derived using the Coats-Redfern integral method. The results show that differences in the pyrolysis of the three components result mainly from differences in their molecular structures. The observed mass losses of cellulose, xylan hemicellulose and lignin were approximately 86%, 69%, and 51% respectively within the experimental temperature range （room temperature to 900 ℃ ）, indicating that the extent of decomposition varies in the order cellulose 〉 xylan hemicellulose 〉 lignin. In each case two distinct temperature regions were observed. The pyrolysis of both lignin and xylan can be described by second-order kinetics equations in both temperature regions. The best description of the pyrolysis of cellulose, however, involves a first-order reaction in the low temperature region and a second-order reaction in the high temperature region.