The use of La1-xSrxFeO3 perovskite-type oxides as oxygen carriers in chemical-looping reforming of methane

doi:10.1016/j.fuel.2012.11.035

GIEC OpenIR > 中国科学院广州能源研究所

	The use of La1-xSrxFeO3 perovskite-type oxides as oxygen carriers in chemical-looping reforming of methane
	He, Fang; Li, Xinai; Zhao, Kun; Huang, Zhen; Wei, Guoqiang; Li, Haibin
	2013-06-01
发表期刊	FUEL
卷号	108 页码:465-473
摘要	La1-xSrxFeO3 perovskite-type oxides with x = 0.1, 0.3, 0.5, and 0.9 were prepared by combustion method. The synthesized perovskites were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, temperature-programmed reduction (TPR), and Fourier transformed infrared spectroscopy (FTIR). Pure phase of perovskite-type crystalline structure was obtained regardless of the degree of Sr substitution. TPR, FTIR, and XRD results suggests that the electronic unbalance caused by the partial substitution for La3+ by Sr2+ is compensated by oxidation of a fraction of Fe3+ to Fe4+ and/or generation of oxygen vacancies in the perovskite lattice. There exist two kinds of oxygen species on the oxides: surface absorption oxygen and bulk lattice oxygen. The surface oxygen contributed to oxidize methane completely to CO2 and H2O because of its higher reactivity, while the other one prone to methane partial oxidation into H-2 and CO. The activity of the substituted perovskites decreases as the degree of substitution x > 0.5. However, Sr substitution would inhibit methane decomposition in the methane reaction with La1-xSrxFeO3 perovskites. An optimal range of the degree of Sr substitution is x = 0.3-0.5 for La1-xSrxFeO3. The multicyclic redox reaction results indicated that the synthesized perovskite-type oxides have good regenerability, which is a very important performance required in chemical-looping reforming of methane. (C) 2012 Elsevier Ltd. All rights reserved.
文章类型	Article
关键词	Synthesis Gas Chemical-looping Reforming La1-xsrxfeo3 Perovskites Oxygen Carrier Methane
WOS标题词	Science & Technology ; Technology
DOI	10.1016/j.fuel.2012.11.035
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	SYNTHESIS GAS GENERATION ; COMBUSTION ; REACTOR ; NI ; TECHNOLOGIES ; HYDROGEN ; SUPPORT ; FE2O3 ; MN
收录类别	SCI
语种	英语
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000317565100055
引用统计	被引频次：146[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/10056
专题	中国科学院广州能源研究所
作者单位	Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	He, Fang,Li, Xinai,Zhao, Kun,et al. The use of La1-xSrxFeO3 perovskite-type oxides as oxygen carriers in chemical-looping reforming of methane[J]. FUEL,2013,108:465-473.
APA	He, Fang,Li, Xinai,Zhao, Kun,Huang, Zhen,Wei, Guoqiang,&Li, Haibin.(2013).The use of La1-xSrxFeO3 perovskite-type oxides as oxygen carriers in chemical-looping reforming of methane.FUEL,108,465-473.
MLA	He, Fang,et al."The use of La1-xSrxFeO3 perovskite-type oxides as oxygen carriers in chemical-looping reforming of methane".FUEL 108(2013):465-473.