生物质的热解过程及其动力学规律  

The pyrolysis characteristics of biomass and its dynamics law

作　　者：程世庆[1] 尚琳琳[1] 张海清[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《煤炭学报》2006年第4期501-505,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(5057212)

摘　　要：采用热重分析法(TGA)对几种常见天然生物质(稻秆、麦秆、玉米秆)和其衍生物木质素、造纸废液颗粒等的热解过程及其动力学规律进行了研究.实验中加热速率分别为10,20,30℃/m in,终温为850℃.热解在氮气气氛下进行,并用高纯氮气作为保护气体.实验结果表明:天然生物质的非等温热解只有1个剧烈失重阶段,而木质素和造纸废液颗粒存在2个剧烈失重阶段.生物质比煤的热解起始温度低,热解速度快.随升温速率的提高,生物质的最大热解速度提高,对应的峰值温度升高,最终失重率呈下降趋势.生物质的热解机理满足三维扩散Jander方程,且随着升温速率的提高,其活化能增大.The pyrolysis characteristics and dynamics of the natural biomass （including rice stalks, wheat stalks, corn stalks etc. ） and their ramifications （lignin and paper mill sullage particles） were studied using the thermogravimetric analysis （TGA） method under different heating rate, which are 10, 20, 30℃/min respectively. The terminal temperature of furnace is 850℃ and the high pure N： is used as reacting and protecting gas. The results show that： the natural biomass has only one fast agravic period, but the ramification has two. The starting decompose temperature of biomass is lower and the velocity is higher than that of the coal. With the rise of heating rate, the maximum decompose rate and its corresponding temperatures of biomass increases, but the final agravic quotient decreases. Pyrolysis mechanism of biomass is suitable for 3 D diffuse Jander equation, and the activated energy increases with the rise of heating rate.

关 键 词：生物质 热解过程 动力学 热重分析 

分 类 号：TK6[动力工程及工程热物理—生物能]