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林产化学与工业 ›› 2012, Vol. 32 ›› Issue (5): 83-87.

• 1研究报告 • 上一篇    下一篇

杨木刨花板的热解动力学分析

黄志义, 冯永顺, 于志明, 母军   

  1. 北京林业大学 材料科学与技术学院, 北京 100083
  • 收稿日期:2011-10-31 修回日期:1900-01-01 出版日期:2012-10-30 发布日期:2012-10-30
  • 通讯作者: 于志明,博士生导师,主要研究方向为木质复合材料。

Kinetic Mechanism of Pyrolysis Reaction Using Poplar Particleboards as Raw Material

HUANG Zhi-yi, FENG Yong-shun, YU Zhi-ming, MU Jun   

  1. College of Materials Science and Technology,Beijing Forestry University, Beijing 100083, China
  • Received:2011-10-31 Revised:1900-01-01 Online:2012-10-30 Published:2012-10-30

摘要: 采用热重分析仪对杨木刨花板进行热解,结合Coats-Redfern法分析热重曲线,探讨了反应机理。结果表明:杨木刨花板的热解过程分为失水干燥、快速热解和慢速热解3个阶段;升温速率的提高使热解最大失重速率增大,热解的各个阶段向高温方向横向偏移。快速热解阶段的反应机理满足D3模型,热解的活化能(E)107.24 kJ/mol;5、10和 20 ℃/min 3种速率下的指前因子(A)值分别为2.09×105、6.57×105和3.22×105 s-1

关键词: 杨木刨花板, 热解, 动力学, 反应机理

Abstract: The pyrolysis reactions of poplar particleboards were carried out using the thermogravimetric apparatus, The TG and DTG curves were used to analysis the pyrolysis mechanism by Coats-Redfern method. The results show that the non-isothermal pyrolysis of poplar particleboards can be generally divided into three stages:dehydration, fast pyrolysis and slow pyrolysis. As the heating rate increased, the maximum rate of weight loss were also increased. It was found that there was a lateral shift in the TGA curves to higher temperatures. The fast pyrolysis stage can be described by the model of D3.The activation energy is 107.24 kJ/mol, and the pre-exponpential factors of 5,10 and 20 ℃/min are 2.09×105 s, 6.57×105, 3.22×105 s-1, respectively.

Key words: poplar particleboards, pyrolysis, kinetics, pyrolytic mechanism

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