水城褐煤热解的气体产物析出特征及甲烷的生成反应类型研究  

Evolution of gaseous products and analysis of methane generation reaction types during pyrolysis of Shuicheng lignite

作　　者：韩峰[1] 张衍国[1] 蒙爱红[1] 李清海[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室二氧化碳资源化利用与减排技术北京市重点实验室,北京100084

出　　处：《燃料化学学报》2014年第1期7-12,共6页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划(973计划;2011CB201502);云南省科技创新强省计划(2010AD010);云南省重大科技专项-新能源(2012ZB006)

摘　　要：利用傅里叶红外光谱仪研究了煤中主要官能团的分布,利用热重-质谱联用(TG/MS)在10℃/min的条件下研究了水城褐煤的热解行为,获得了煤热解主要挥发分气体(H2、CH4、H2O、CO、CO2)生成的速率曲线。采用分峰拟合的方法将甲烷的生成速率曲线分解为五个峰,通过化学动力学分析,结合煤的结构特性、热解特性及其他挥发分气体的生成特征,认为甲烷的生成主要由一个脱吸附过程和四个化学反应组成。The Fourier transform infrared （FT-IR） spectroscopy was applied to investigate the functional groups of Shuicheng lignite, and the simultaneous thermogravimetry-mass spectrometry （TG/MS） at heating rate of 10 ℃/min was used to investigate the pyrolysis behavior of coal. The instantaneous evolution of the gaseous products （H2, CH4, H2O, CO, CO2） was studied by means of temperature-programmed pyrolysis experiments. The pyrolytic generation characteristics of methane was specially analyzed. Five peaks were fitted and the kinetic parameters were calculated by the fitting of curves. By the kinetic analysis combined with structure analysis, pyrolysis characteristics and the evolution features of other volatiles during pyrolysis, it is found that the lowest temperature peak represents the desorption of adsorbed methane in coal and the other four peaks are the results of methane generation during pyrolysis, which involves four types of reactions.

关 键 词：官能团 热解 质谱 甲烷 水城褐煤 

分 类 号：TQ530.2[化学工程—煤化学工程]