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differentoxidationroutesforlatticeoxygenrecoveryofdoubleperovskitetypeoxideslasrfecoo6asoxygencarriersforchemicalloopingsteammethanereforming
Zhao Kun; Shen Yang; Huang Zhen; He Fang; Wei Guoqiang; Zheng Anqing; Li Haibin; Zhao Zengli
2017
发表期刊journalofenergychemistry
ISSN2095-4956
卷号26期号:3页码:501
摘要Double-perovskite type oxide LaSrFeCoO6 (LSFCO) was used as oxygen carrier for chemical looping steam methane reforming (CL-SMR) due to its unique structure and reactivity. Two different oxidation routes, steam-oxidation and steam-air-stepwise-oxidation, were applied to investigate the recovery behaviors of the lattice oxygen in the oxygen carrier. The characterizations of the oxide were determined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H-2 -TPR) and scanning electron microscopy (SEM). The fresh sample LSFCO exhibits a monocrystalline perovskite structure with cubic symmetry and high crystallinity, except for a little impurity phase due to the antisite defect of Fe/Co disorder. The deconvolution distribution of XPS patterns indicated that Co, and Fe are predominantly in an oxidized state (Fe3+ and Fe2+) and (Co2+ and Co-3 (+)), while O 1s exists at three species of lattice oxygen, chemisorbed oxygen and physical adsorbed oxygen. The double perovskite structure and chemical composition recover to the original state after the steam and air oxidation, while the Co ion cannot incorporate into the double perovskite structure and thus form the CoO just via individual steam oxidation. In comparison to the two different oxidation routes, the sample obtained by steam-oxidation exhibits even higher CH4 conversion, CO and H-2 selectivity and stronger hydrogen generation capacity. (C) 2016Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
语种英语
资助项目[National Natural Science Foundation of China] ; [Science & Technology Research Project of Guangdong Province] ; [Key Laboratory of Renewable Energy, Chinese Academy of Sciences]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/21965
专题中国科学院广州能源研究所
作者单位中国科学院广州能源研究所
第一作者单位中国科学院广州能源研究所
推荐引用方式
GB/T 7714
Zhao Kun,Shen Yang,Huang Zhen,et al. differentoxidationroutesforlatticeoxygenrecoveryofdoubleperovskitetypeoxideslasrfecoo6asoxygencarriersforchemicalloopingsteammethanereforming[J]. journalofenergychemistry,2017,26(3):501.
APA Zhao Kun.,Shen Yang.,Huang Zhen.,He Fang.,Wei Guoqiang.,...&Zhao Zengli.(2017).differentoxidationroutesforlatticeoxygenrecoveryofdoubleperovskitetypeoxideslasrfecoo6asoxygencarriersforchemicalloopingsteammethanereforming.journalofenergychemistry,26(3),501.
MLA Zhao Kun,et al."differentoxidationroutesforlatticeoxygenrecoveryofdoubleperovskitetypeoxideslasrfecoo6asoxygencarriersforchemicalloopingsteammethanereforming".journalofenergychemistry 26.3(2017):501.
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