热解温度对淮南煤热解与CO_2气化特性的影响  

Effect of the pyrolysis and CO_2 gasification characteristics of coal from Huainan on pyrolysis temperature

作　　者：徐朝芬[1] 向军[1] 孙路石[1] 胡松[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2010年第11期100-103,107,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2009CB226100;2010CB227003)

摘　　要：采用STA409热综合分析仪研究了不同热解温度(950℃,1200℃和1400℃)下淮南煤的热解特性,同时采用傅里叶红外光谱仪、扫描电镜和X射线衍射仪等对不同热解温度下煤焦的物化特性进行了分析.发现随着热解终温的升高,煤焦表面孔隙增大,总孔体积和孔面积也明显增大;煤焦的碳微晶结构逐渐向有序化方向发展,并最终导致石墨化,化学稳定性增强;同时煤焦内C元素的含量快速增加而H含量逐渐减少,且煤焦内有机官能团的红外吸收也明显减少;煤焦的活化能随碳转化率的增大和热解终温的升高而增大,说明煤焦的CO2气化活性随温度升高而降低.The pyrolysis characteristic of the coal from Huainan at pyrolysis temperatures of 950℃, 1 200℃and 1 400℃was investigated by thermogravimetric method,and physical and chemical properties resulting chars were investigated by Fourier transform infrared spectrometer（FTIR）,scanning electron microscope（SEM）and X-ray diffraction（XRD）analyzer.The results show that the pore structure,pore volume and pore area were increased with pyrolysis temperature increased;the carbon crystallite structures of coal chars ordered gradually,and led to graphitization,and the chemistry stability increased.The C elementary of the char inner increased quickly but the H elementary decreased, and the infrared radiation（IR）absorb of organic functional groups decreased obviously;the activation energy increased with carbon conversion and pyrolysis temperature increased,showing that the CO2 gasification activity will decrease when the temperature increases.

关 键 词：煤 热解 温度 煤焦 气化活性 物化特性 热重法 

分 类 号：TK16[动力工程及工程热物理—热能工程]