Zhao Kun; Shen Yang; Huang Zhen; He Fang; Wei Guoqiang; Zheng Anqing; Li Haibin; Zhao Zengli
Source Publicationjournalofenergychemistry
AbstractDouble-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.
Funding Project[National Natural Science Foundation of China] ; [Science & Technology Research Project of Guangdong Province] ; [Key Laboratory of Renewable Energy, Chinese Academy of Sciences]
Document Type期刊论文
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
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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