Citation: Kun Zhao, Fang He, Zhen Huang, Anqing Zheng, Haibin Li, Zengli Zhao. La_1-xSr_xFeO₃ perovskites as oxygen carriers for the partial oxidation of methane to syngas[J]. Chinese Journal of Catalysis, ;2014, 35(7): 1196-1205. doi: 10.1016/S1872-2067(14)60084-X shu

La_1-xSr_xFeO₃ perovskites as oxygen carriers for the partial oxidation of methane to syngas

Kun Zhao ^a,b ,
Fang He ^a,, ,
Zhen Huang ^a ,
Anqing Zheng ^a ,
Haibin Li ^a ,
Zengli Zhao ^a

1.
a. Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;

Corresponding author: Fang He,
Received Date: 8 December 2013
Available Online: 20 March 2014
Fund Project:

We prepared perovskite-type oxides La_1-xSr_xFeO₃ (x =0, 0.3, 0.5, 0.9) by a combustion method and used these as oxygen carriers for the partial oxidation of methane. X-ray diffration, scanning electron microscopy and H₂ temperature-programmed reduction techniques were used to characterize the samples. Their reduction and oxidation activities were investigated using a thermogravimetric analysis reactor and fixed-bed reaction equipment, respectively. The results showed that the lattice oxygen in La_1-xSr_xFeO₃was suitable for the partial oxidation of methane to produce syngas. Their capacity to provide oxygen was enhanced by the partial substitution of La³⁺ by Sr²⁺ and the synthesized materials have good regenerability. The optimal degree of Sr substitution was found to be x=0.3-0.5 for La_1-xSr_xFeO₃ with regard to reactivity, selectivity, and oxygen-donating ability. CH₄ conversion was higher than 70%, and the n(H₂)/n(CO) ratio remained about 2:1 and no obvious decomposition of CH₄occurred.
- Perovskite,
- Lattice oxygen,
- Thermogravimetric redox,
- Partial oxidation,
- Syngas
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沈阳化工大学材料科学与工程学院沈阳 110142

La1-xSrxFeO3 perovskites as oxygen carriers for the partial oxidation of methane to syngas

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La_1-xSr_xFeO₃ perovskites as oxygen carriers for the partial oxidation of methane to syngas