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Preparation of double perovskite-type oxide LaSrFeCoO6 for chemical looping steam methane reforming to produce syngas and hydrogen
Zhao Kun1,2,3; Shen Yang3; He Fang1; Huang Zhen1; Wei Guoqiang1; Zheng Anqing1; Li Haibin1; Zhao Zengli1
2016-10-01
Source PublicationJOURNAL OF RARE EARTHS
Volume34Issue:10Pages:1032-1041
AbstractDouble-perovskite type oxide LaSrFeCoO6 was used as oxygen carrier for chemical looping steam methane reforming (CL-SMR) due to its unique structure and reactivity. Solid-phase, amorphous alloy, sol-gel and micro-emulsion methods were used to prepare the LaSrFeCoO6 samples, and the as-prepared samples were characterized by means of X-ray diffraction (XRD), hydrogen temperature-programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface area. Results showed that the samples made by the four different methods exhibited pure crystalline perovskite structure. The ordered double perovskite LaSrFeCoO6 was regarded as a regular arrangement of alternating FeO6 and CoO6 corner-shared octahedra, with La and Sr cations occupying the voids in between the octahedral. Because the La3+ and Sr2+ ions in A-site did not take part in reaction, the TPR patterns showed the reductive properties of the B-site metals. The reduction peaks at low temperature revealed the reduction of adsorbed oxygen on surface and combined with the reduction of Co3+ to Co2+ and to Co-0, while the reduction of Fe3+ to Fe2+ and the partial reduction of Fe2+ to Fe-0 occurred at higher temperatures. From the point of view of the oxygen-donation ability, resistance to carbon formation, as well as hydrogen generation capacity, the sample made by micro-emulsion method exhibited the best reactivity. Its redox reactivity was very stable in ten successive cycles without deactivation. Compared to the single perovskite-type oxides LaFeO3 and LaCoO3, the double perovskite LaSrFeCoO6 exhibited better syngas and hydrogen generation capacity.
SubtypeArticle
KeywordDouble-perovskite Cl-smr Micro-emulsion Oxygen Species Redox Rare Earths
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/S1002-0721(16)60131-X
WOS Subject ExtendedChemistry
WOS KeywordOXYGEN-CARRIERS ; CATALYTIC PERFORMANCE ; PARTIAL OXIDATION ; MIXED OXIDES ; COMBUSTION ; TEMPERATURE ; SR
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51406208 ; Science & Technology Research Project of Guangdong Province(2013B050800008 ; 51406214) ; 2015A010106009)
WOS SubjectChemistry, Applied
WOS IDWOS:000386780700010
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/13915
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhao Kun,Shen Yang,He Fang,et al. Preparation of double perovskite-type oxide LaSrFeCoO6 for chemical looping steam methane reforming to produce syngas and hydrogen[J]. JOURNAL OF RARE EARTHS,2016,34(10):1032-1041.
APA Zhao Kun.,Shen Yang.,He Fang.,Huang Zhen.,Wei Guoqiang.,...&Zhao Zengli.(2016).Preparation of double perovskite-type oxide LaSrFeCoO6 for chemical looping steam methane reforming to produce syngas and hydrogen.JOURNAL OF RARE EARTHS,34(10),1032-1041.
MLA Zhao Kun,et al."Preparation of double perovskite-type oxide LaSrFeCoO6 for chemical looping steam methane reforming to produce syngas and hydrogen".JOURNAL OF RARE EARTHS 34.10(2016):1032-1041.
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