竹质材料热解失重行为及其动力学研究

STUDY ON PYROLYSIS CHARACTERISTICS AND KINETICS OF BAMBOO UNDER LINER HEATING TEMPERATURE

利用热重分析在不同升温速率（5～40K·min^-1）和氮气气氛下对两种竹质材料（毛竹和孝顺竹）的热解失重行为进行了研究。实验结果表明竹质材料在热解过程中可分为失水干燥、预热解、快速热解和残余物缓慢分解等4个阶段组成。快速热解阶段可由一级反应过程描述，根据一级反应由Coats-Redfem法计算毛竹和孝顺竹的平均活化能E分别为50．5kJ／mol和61．1kJ／mol。实验还表明加热速率越大，热解速度越快。

Thermogravimetric analysis was used to study the pyrolysis characteristic of two bamboo sample, PhUostachys pubeseens and Bambusa multiplex, at different heating rates（5 - 40 K·min^-1 ） in a stream of N2. The result shows that the pyrolysis process includes 4 stages, drying, pre-pyrolysis, fast-pyrolysis, and residue slow decomposition. The pyrolysis process can be described by first-order reaction model. With the method of Coasts-Redfem, the average activation energy of PhUostachys pubeseens and Bambusa multiplex was 50.5kJ/mol and 61. 1kJ/mol. The pyrolysis speed increases with increasing the heating rate.