沙尔湖褐煤和红沙泉不粘煤的热解动力学及热解产物分布  

Pyrolysis kinetics and product distribution of two coals

作　　者：韩峰[1] 蒙爱红[1] 鲁伟[1] 张衍国[1] 李清海[1] 

机构地区：[1]清华大学热能工程系,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：《清华大学学报（自然科学版）》2013年第3期348-352,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究发展计划(2011CB201502);云南省重大科技专项(2012ZB006)

摘　　要：该文对沙尔湖褐煤和红沙泉不粘煤两种煤样进行了热解动力学分析和热解产物分布特性研究。采用TA-Q600在氮气载气量为100mL/min、4种升温速率(30、50、80、100℃/min)下进行热解,然后利用Flynn-Wall-Ozawa(FWO)法和分布活化能模型(distributed activation energy model,DAEM)进行动力学分析。分析结果表明:两种煤的活化能随着转化率的升高而升高;不同煤阶煤样活化能分布存在差异,沙尔湖褐煤和红沙泉不粘煤分别在活化能200kJ/mol和150kJ/mol处出现分布函数的最大值。铝甑低温热解法(510℃)和格金低温热解法(600℃)分析表明沙尔湖褐煤焦油产率分别为8.16%和10.18%,而红沙泉不粘煤分别为7.43%和8.49%。The pyrolysis of Shaerhu （SHE） lignite and Flungshaquan （HSQ） non-caking coal was investigated in an inert gas flow by thermogravime/ric analysis （TGA） using TA-Q600 at heating rates of 30, 50, 80 and 100 ℃/min. The pyrolysis product distributions were then investigated based on Chinese standards at 510℃ and 600 ℃. The temperature, T at which the maximum weight loss occurs, increases with the increasing heating rate. The activation energy calculated using the Flynn-Wall-Ozawa （FWO） method and the distributed activation energy model （DAEM） increases with the conversion rate. The maximum activation energy distribution f（E） of the SEH and HSQ coals occurs at activation energies of 200 kJ/mol and 150 kJ/moi. The SEH coal pyrolysis produces about 8. 16% tar （air dry basis） at 510℃, which is higher than that of the HSQ, 7.43% （air dry basis）. At 600℃, the tar produced by the SEH coal pyrolysis increases to 10.18%, while that of the HSQ coal increases to 8.49 %.

关 键 词：热解 热重分析(TGA) 动力学 活化能 焦油 

分 类 号：TQ530.2[化学工程—煤化学工程]