用于化学链乙烷氧化脱氢的镍铁基氧载体  

Ni-Fe Based Oxygen Carrier for Chemical Looping-Oxidation Dehydrogenation of Ethane

作　　者：李颖[1] 赵海波[1] Li Ying;Zhao Haibo(State Key Laboratory for Coal Combustion and Low-Carbon Utilization,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学煤燃烧与低碳利用全国重点实验室,武汉430074

出　　处：《燃烧科学与技术》2025年第2期111-119,共9页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52025063);国家重点研发计划资助项目(2022YFE0135500).

摘　　要：针对化学链乙烷氧化脱氢过程,利用初湿浸渍法合成了一系列H-ZSM5分子筛负载的Ni-Fe基氧载体.通过等温实验、工况验证以及长周期循环实验考察了氧载体的反应性能,并利用XRD、FTIR、C2H6-TPR及ESEM-EDS表征分析了氧载体的反应机制.实验结果表明,Ni物种进入了分子筛骨架中,Fe物种均匀地分散在分子筛表面.前者负责乙烷转化,后者负责选择性产生乙烯,二者的协同作用使得氧载体相对于纯相负载分子筛氧载体具有更高的乙烷转化率和乙烯选择性.其中,优选氧载体在650℃时具有92.21%的乙烯选择性及16.34%的乙烯产率,并且在24次氧化还原循环过程中保持性能稳定.Ni-Fe-based oxygen carriers supported on H-ZSM5 zeolite were synthesized using the incipient wet impregnation method for the chemical looping ethane oxidation dehydrogenation process.The reaction performance of the oxygen carrier was investigated through isothermal experiments,test conditions verification,and long-term cyclic experiments.The reaction mechanism of the oxygen carrier was characterized and analyzed by XRD,FTIR,C2H6-TPR,and ESEM-EDS.Experimental results show that Ni species enter the framework of zeolite while Fe species are uniformly dispersed on its surface.The former is responsible for ethane conversion while the latter selectively produces ethylene;their synergistic effect results in higher ethane conversion and ethylene selectivity compared to pure-phase loaded zeolite oxygen carriers.Among them,an optimal oxygen carrier exhibits 92.21%ethylene selectivity and 16.34%ethylene yield at 650℃while maintaining stable performance during 24 cycles of redox processes.

关 键 词：化学链 氧化脱氢 镍铁基 分子筛 乙烷 

分 类 号：TK16[动力工程及工程热物理—热能工程]