褐煤与生物质共热解过程的协同效应  

SYNERGISTIC EFFECT OF CO-PYROLYSIS PROCESS OF LIGNITE AND BIOMASS

作　　者：金会心[1,2] 朱明燕[3] 吴复中 王眉龙 王洋[1] 李辉[1] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州大学贵州省冶金工程与过程节能重点实验室,贵阳550025 [3]贵州科学院贵州省冶金化工研究所,贵阳硕士助理研究员550002

出　　处：《煤炭转化》2016年第3期34-38,共5页Coal Conversion

基　　金：贵州省优秀青年科技人才培养对象专项资金资助项目(黔科合人字(2011)06号)

摘　　要：通过热重分析的方法对褐煤、生物质及褐煤生物质混合物的热解特性进行研究,以考察生物质与褐煤共热解过程中是否存在协同效应,结果表明:将褐煤与生物质按1∶1(质量比)的比例混合后,其初始热解温度及挥发分最大释放峰出现温度与生物质单独热解基本相同,热解终温与褐煤相比大幅度提前,混合物热解在各个阶段的失重率均大于其单独热解失重率的平均值.褐煤、生物质及其混合物的热解过程可以用一级和二级热解反应动力学模型描述,通过计算动力学参数,发现在整个主要热解过程中,混合物在各个温度段的E值均小于褐煤或生物质单独热解时的E值,热解反应更加容易进行.证明了生物质对褐煤的热解有促进作用,褐煤与生物质在共热解过程中存在协同效应.This article mainly studied the pyrolysis characteristics of lignite, biomass, and the mixture of lignite and biomass through analyzing thermogravimetric, to investigate whether there is a synergistic effect between biomass and lignite co-pyrolysis process. The results showed that the temperature of initial pyrolysis and the maximal volatiles released peak was equal to the single biomass under the condition of 1 ： 1 proportionally-mixed of lignite and biomass, the final pyrolysis temperature brought forward in a large margin compared with lignite, and the weight loss rate of mixture pyrolysis in different stages were greater than the mean value of single biomass. In addition, the pyrolysis process of lignite, biomass and the mixture of lignite and biomass were described by first and second level reaction kinetics model, and it was found that the activation energy of different temperature ranges of mixture were less than that of the single lignite or biomass in the main process of pyrolysis by calculating the kinetic parameter, and the pyrolysis was proceed easily. It proves that biomass has auxo-action for the pyrolysis of lignite, and the synergistic effect exists in co-pyrolysis of lignite and biomass.

关 键 词：褐煤 生物质 共热解 协同效应 

分 类 号：TQ530.2[化学工程—煤化学工程]