Preparation of double perovskite-type oxide LaSrFeCoO_6 for chemical looping steam methane reforming to produce syngas and hydrogen

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	Preparation of double perovskite-type oxide LaSrFeCoO_6 for chemical looping steam methane reforming to produce syngas and hydrogen
	Zhao Kun1 ; Shen Yang 2; He Fang1 ; Huang Zhen 1; Wei Guoqiang 1; Zheng Anqing1 ; Li Haibin1 ; Zhao Zengli1
	2016
发表期刊	Journal of Rare Earths
ISSN	1002-0721
卷号	34 期号:10 页码:1032
摘要	Double-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.
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Science & Technology Research Project of Guangdong Province]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/20938
专题	中国科学院广州能源研究所
作者单位	1.中国科学院广州能源研究所 2.中国科学院大学
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,He Fang,et al. Preparation of double perovskite-type oxide LaSrFeCoO_6 for chemical looping steam methane reforming to produce syngas and hydrogen[J]. Journal of Rare Earths,2016,34(10):1032.
APA	Zhao Kun.,Shen Yang.,He Fang.,Huang Zhen.,Wei Guoqiang.,...&Zhao Zengli.(2016).Preparation of double perovskite-type oxide LaSrFeCoO_6 for chemical looping steam methane reforming to produce syngas and hydrogen.Journal of Rare Earths,34(10),1032.
MLA	Zhao Kun,et al."Preparation of double perovskite-type oxide LaSrFeCoO_6 for chemical looping steam methane reforming to produce syngas and hydrogen".Journal of Rare Earths 34.10(2016):1032.