褐煤半焦加氢残渣的CO_2气化反应特性及动力学  

Study on CO_2 Gasification Reaction Reactivity and Kinetics of Lignite Semi-coke Hydrogenation Residue

作　　者：丁晓阔[1] 陆桃军[1] 郝树宏[2] 张永发[1] 李香兰[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,太原030024 [2]山西电力科学研究院,太原030001

出　　处：《太原理工大学学报》2013年第6期699-703,708,共6页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51274147);国家科技支撑计划(2012BAA04B03);国家重点基础研究发展计划(2012CB723105)

摘　　要：利用差热天平TG-DTA对内蒙古褐煤半焦加氢制甲烷残渣的CO2气化反应特性和反应动力学进行了研究。研究结果表明,在CO2气化过程中,不同加氢终温残渣的转化率随反应时间的变化规律一致;随着升温速率的加快,加氢残渣CO2气化的最大反应速率增大,最大反应速率对应的反应温度升高;最大反应速率r与升温速率β的关系符合线性关系r=mβ+l;加氢残渣CO2气化的反应级数n随升温速率β的增加而增大;加氢残渣CO2气化活化能E与升温速率β的关系可用E=aβ2+bβ+c描述,活化能E与加氢终温TF的关系符合E=aβT2F+bβTF+cβ,指前因子A与活化能E存在动力学补偿关系lnA=eE+f.The reactivity and kinetics on the CO2 gasification of hydrogenation residues,which were produced by the hydrogasification of Inner Mongolian lignite semi-coke,were studied by means of TG-DTA.The results show that,during the CO2 gasification process,the conversion versus time curve of the residues deriued from different final hydrogenation temperatures were of similar type,and with the rise of heating rate,the maximum reaction rate and the corresponding temperature were increased.The relationship between the heating rate β and the maximum rate r could be described as r=mβ＋l; the reaction order was increased with the increase of heating rate,the relationship between the heating rate β and residue CO2 gasification activation energy was E=aβ2 ＋bβ＋c.Hydrogenation temperature TF and the activation energy E were in relationship of E=aβT2F ＋bβTF ＋cβ.Kinetic compensation relationship lnA=eE＋f existed between reaction activation energy E and pre-exponential factor A.

关 键 词：煤制甲烷 加氢残渣 褐煤半焦 CO2气化 动力学 

分 类 号：TQ541[化学工程—煤化学工程]