摘要
该文采用Popescu法对2种烟煤和2种无烟煤的燃烧反应的机理函数进行推断。对12种反应模型的分析结果表明,对于烟煤的燃烧反应,三维扩散模型控制的反Jander方程是最概然机理函数;对于无烟煤,相边界收缩圆柱体模型是最符合反应机理的;当需要对烟煤和无烟煤的燃烧过程选用统一的反应模型时,三维扩散模型控制的反Jander方程是最佳的。而通常采用的反应级数模型,虽然具有一定的适用性,但不是最优的。因此,Popescu法比采用Arrhenius公式的单个扫描速率法更为合理、可靠。
Popescu Method is applied to analyze the combustion kinetic mechanisms of two kinds of bituminous coal and two kinds of anthracite coal, and twelve kinds of the reaction mechanism are investigated. The results show that the combustion of bituminites is controlled by the threedimensional diffusion model and the anti Jander equation is the most probable kinetic function, and that the combustion of anthracites is in according with the shrinking cylinder mechanism with surface reaction rate controlling. If a unified model is needed for the combustion of bituminite and anthracite, the three-dimensional diffusion model controlled by the anti Jander equation is the best. The reaction order model employed as a general rule, though feasible to some extent, is not optimal. A conclusion can be made that Popescu method is more rational and reliable than the single scan method in which Arrhenius formula is adopted.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第15期68-72,共5页
Proceedings of the CSEE
关键词
热能动力工程
煤燃烧
热天平
机理函数
Popescu法
thermal power engineering
coal combustion
thermobalance
mechanism function
Popescu method
