摘要
在利用热重法判断热解反应机理时,传统方法很难确切推断反应的机理。为此,从热解曲线和动力学方程出发,运用双外推法,得到了平均颗粒粒度为10.68μm的元宝山褐煤热解低温段部分的机理为Anti-Jander三维扩散方程;同时对元宝山褐煤不同粒度煤样的热解特性进行了研究,分析了升温速率和颗粒粒度对煤粉热解特性的影响。
By employing the traditional method of thermogravimetry it is very difficult to accurately deduce the reaction mechanism of pyrolysis. In view of this, the authors have on the basis of pyrolysis curves and kinetic equations made use of a dual extrapolation method and obtained the pyrolysis mechanism for Yuanbaoshasn lignite at an average particulate diameter of 10.68 μm. It has been ascertained that its pyrolysis mechanism at the low temperature section assumes an Anti-Jander three-dimensional diffusion equation. Meanwhile, the pyrolysis characteristics of Yuanbaoshan lignite of different particulate samples were also studied along with an analysis of the impact of temperature rise rate and particulate size on the pyrolysis characteristics of the pulverized lignite.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2005年第4期407-410,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家高技术研究发展计划基金资助项目(2002AA527051)
关键词
超细煤粉
双外推法
热重分析
颗粒粒度
热解机理
super-fine pulverized lignite, dual extrapolation method, thermogravimetric analysis, particulate size, pyrolysis mechanism