Cycle performance of Cu-based oxygen carrier based on a chemical-looping combustion process

查看全文 作　　者：Xiaoming [1,2]Zheng;Lixin [2]Che;Yanqiong [2]Hao;Qingquan [1,3]Su

机构地区：[1]School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;[2]Beijing Gas Group Research Institute, Beijing 100011, China;[3]Beijing Engineering Research Center for Energy Saving and Environmental Protection, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of Energy Chemistry》索引2016年第25卷第1期,共9页

基　　金：supported by the Beijing Science and Technology Program(Grant no.Z131100005613045);the National Natural Science Foundation of China(Grant no.51306015);the Fundamental Research Funds for the Central Universities(Grant no.FRF-SD-12-013A) 摘　　要：The cycle life of oxygen carrier(OC) is crucial to the practical applications of chemical looping combustion(CLC). Cycle performance of Cu/SiO_2 prepared with a mechanical mixing method was evaluated based on a CLC process characterized with an added methane steam reforming step. The Cu/SiO_2 exhibited high redox reactivity in the initial cycles, while the performance degraded with cycle number. Through characterization of the degraded Cu/SiO_2, the performance degradation was mainly caused by the secondary particles' fragmentation and the fine particles' local agglomeration, which worsened the distribution and diffusion of the reactive gases in the packed bed. A regeneration method of the degraded OC based on re-granulation has been proposed, and its mechanism has been illustrated. With this method, the performance of the degraded OC through 420 redox cycles was recovered to a level close to the initial one. 关键词：化学链燃烧循环性能氧载体燃烧过程氧化还原循环铜性能退化二氧化硅

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Cycle performance of Cu-based oxygen carrier based on a chemical-looping combustion process

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