神木煤-CH_4微波共热解产物生成规律研究  

STUDY ON PRODUCT GENERATING RULE OF SHENMU COAL-CH_4 MICROWAVE CO-PYROLYSIS

作　　者：李国亮[1] 刘全润[1] 方小可 李鹏[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作硕士生454000

出　　处：《煤炭转化》2015年第4期12-15,共4页Coal Conversion

基　　金：中国科学院战略性先导科技专项项目(XDA05010304)

摘　　要：以半焦作为微波吸收剂和CH4裂解催化剂,在固定床反应器上考察了CH4气氛下神木煤微波热解特性,对CH4气氛下神木煤-半焦混合物在不同温度（450℃~700℃）下微波热解产物的生成规律进行了研究,并与相同条件的N2气氛下微波热解结果进行了比较.研究表明,CH4气氛下神木煤的微波热解半焦产率比N2气氛下的半焦产率低;而焦油产率和热解水产率高于相同条件N2气氛下的焦油和热解水产率.在CH4气氛下煤-半焦混合物微波热解,H2和CO产率高于N2气氛下的结果,而CO2产率低于N2气氛下微波热解的CO2产率.综合对比两种气氛下热解产物的生成规律可知,在半焦催化作用下,CH4在微波加热条件下可以实现对神木煤的直接加氢,提高煤的热解转化率.In order to investigate the characteristics of microwave pyrolysis of Shenmu coal（SM）under CH4 atmosphere in a fixed bed reactor,the char of SM was added to the raw coal as the microwave absorbent and catalyst CH4 decomposition,the formation and distribution of products in the process of microwave pyrolysis of coal-char mixture（CCM）at various temperatures（450 ℃-700 ℃）under CH4 atmosphere were analyzed and compared with that under N2 atmosphere at the same condition.The results showed that the char yield of CCM under CH4 atmosphere was lower than that under N2atmosphere;however,microwave pyrolysis of coal under CH4 atmosphere had higher tar and water yield than that under N2 atmosphere.Under CH4 atmosphere,the CCM had higher H2 and CO yield but less CO2 yield compared with N2 atmosphere.In the comprehensive comparison of the generation and distribution of microwave pyrolysis products between the two kinds of atmosphere,it could prove that coal pyrolysis could be hedrogenated by CH4 directly with the help of char＇s catalytic effect on CH4 decomposition.

关 键 词：甲烷 微波 热解 焦油 

分 类 号：TQ530.2[化学工程—煤化学工程]