LaFeO_(3)氧载体在乙烷化学链干重整中的性能评估  

Performance Evaluation on LaFeO_(3) Oxygen Carriers in Chemical Looping Dry Reforming of Ethane

作　　者：李梦双 彭鹏[2] 田鑫[2] 赵海波[2] Li Mengshuang;Peng Peng;Tian Xin;Zhao Haibo(China-EU Institute for Clean and Renewable Energy,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Coal Combustion,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学中欧清洁与可再生能源学院,武汉430074 [2]华中科技大学能源与动力工程学院煤燃烧国家重点实验室,武汉430074

出　　处：《燃烧科学与技术》2022年第1期70-77,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51906076,51920105009);中国博士后基金资助项目(2019M662619,2020T130219).

摘　　要：采用溶胶凝胶法制备了钙钛矿型氧化物LaFeO_(3),在固定床上研究了反应温度和重时空速对氧载体在乙烷化学链干重整中性能的影响,以及氧载体的长周期循环性能.结果表明LaFeO_(3)氧载体可实现乙烷向合成气的高效转化,还原态的氧载体可以被CO_(2)氧化以实现其晶格氧的恢复,且表面积碳能被有效清除.反应最佳温度为800℃,此时CO产率最高(54.84%),最佳重时空速为12000L/(kg·h),CO选择性最高(60.16%).在20次循环实验中,LaFeO_(3)氧载体的各项性能指标波动幅度较小,具有较好的反应稳定性.Perovskite-type oxide LaFeO_(3) was prepared by the sol-gel method.The reaction characteristics of chemical looping dry reforming of ethane were studied with LaFeO_(3) as an oxygen carrier in a fixed-bed reactor.Both the influence of temperature and weight hourly space velocity(WHSV)on the conversion performance of ethane and the long-periodic stability of oxygen carrier were studied.The results show that LaFeO_(3) can efficiently convert ethane into syngas.The reduced LaFeO_(3) oxygen carrier can be oxidized by CO_(2) to recover its lattice oxygen,and the carbon deposit on the surface of oxygen carrier particles can be effectively removed.The optimal reaction temperature is 800℃,at which the CO yield is the highest(54.84%),the optimal WHSV is 12000 L/(kg·h),and the CO selectivity is the highest(60.16%).The fluctuation of each performance index in the 20-cycle experi-ment is small,indicating that the LaFeO_(3) oxygen carrier has good stability.

关 键 词：化学链 乙烷干重整 钙钛矿 合成气 

分 类 号：TK11[动力工程及工程热物理—热能工程]