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Different oxidation routes for lattice oxygen recovery of double-perovskite type oxides LaSrFeCoO6 as oxygen carriers for chemical looping steam methane reforming
Zhao, Kun1,2,3; Shen, Yang2,3; Huang, Zhen1; He, Fang1; Wei, Guoqiang1,3; Zheng, Anqing1,3; Li, Haibin1,3; Zhao, Zengli1,3
2017-05-01
Source PublicationJOURNAL OF ENERGY CHEMISTRY
Volume26Issue:3Pages:501-509
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.
SubtypeArticle
KeywordDouble-perovskite Chemical Looping Lattice Oxygen Oxidizing Agent Redox
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.jechem.2016.11.016
WOS Subject ExtendedChemistry ; Energy & Fuels ; Engineering
WOS KeywordHYDROGEN-PRODUCTION ; MIXED-OXIDE ; CATALYSTS ; SYNGAS ; FE ; COMBUSTION ; CO
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51406208 ; Science & Technology Research Project of Guangdong Province(2015A010106009) ; Key Laboratory of Renewable Energy, Chinese Academy of Sciences(Y607j51001) ; 51406214)
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000404653700026
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14152
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao, Kun,Shen, Yang,Huang, Zhen,et al. Different oxidation routes for lattice oxygen recovery of double-perovskite type oxides LaSrFeCoO6 as oxygen carriers for chemical looping steam methane reforming[J]. JOURNAL OF ENERGY CHEMISTRY,2017,26(3):501-509.
APA Zhao, Kun.,Shen, Yang.,Huang, Zhen.,He, Fang.,Wei, Guoqiang.,...&Zhao, Zengli.(2017).Different oxidation routes for lattice oxygen recovery of double-perovskite type oxides LaSrFeCoO6 as oxygen carriers for chemical looping steam methane reforming.JOURNAL OF ENERGY CHEMISTRY,26(3),501-509.
MLA Zhao, Kun,et al."Different oxidation routes for lattice oxygen recovery of double-perovskite type oxides LaSrFeCoO6 as oxygen carriers for chemical looping steam methane reforming".JOURNAL OF ENERGY CHEMISTRY 26.3(2017):501-509.
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