Study of CeO<sub>2</sub>/LaFeO<sub>3</sub> in chemical looping reforming of methane for syngas production

FANG Xiao-jie; ZHAO Kun; ZHAO Zeng-li; XIA Ming-zhu; LI Hai-bin

doi:10.19906/j.cnki.JFCT.2021053

Volume 49 Issue 9

Sep. 2021

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FANG Xiao-jie, ZHAO Kun, ZHAO Zeng-li, XIA Ming-zhu, LI Hai-bin. Study of CeO2/LaFeO3 in chemical looping reforming of methane for syngas production[J]. Journal of Fuel Chemistry and Technology, 2021, 49(9): 1250-1260. doi: 10.19906/j.cnki.JFCT.2021053

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FANG Xiao-jie, ZHAO Kun, ZHAO Zeng-li, XIA Ming-zhu, LI Hai-bin. Study of CeO₂/LaFeO₃ in chemical looping reforming of methane for syngas production[J]. Journal of Fuel Chemistry and Technology, 2021, 49(9): 1250-1260. doi: 10.19906/j.cnki.JFCT.2021053

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Study of CeO₂/LaFeO₃ in chemical looping reforming of methane for syngas production

doi: 10.19906/j.cnki.JFCT.2021053

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2.
Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China

Funds: The project was supported by the National Natural Science Foundation of China (51876205), National Key Research and Development Program of China (2017YFE0105500), Science & Technology Research Project of Guangdong Province (2017A020216009), Pearl River S&T Nova Program of Guangzhou (201906010092) and Youth Innovation Promotion Association, CAS (2019341)

Received Date: 2021-01-27
Rev Recd Date: 2021-03-31

Available Online: 2021-04-19

Publish Date: 2021-09-30

Abstract

Abstract

Chemical looping methane reforming is a potential route to co-produce syngas and hydrogen by using the oxygen carrier (metal oxide). The oxygen carrier CeO₂/LaFeO₃ was prepared by sol-gel method, and the structure and oxygen supply capacity of the oxygen carrier were analyzed by X-ray powder diffraction and hydrogen temperature programmed reduction. The influence of CeO₂ ratio and reaction temperature on the performance of the oxygen carrier were discussed through fixed bed reaction tests. The content of CeO₂ had a significant effect on the oxygen supply capacity of the oxygen carrier. Increasing reaction temperature not only was conducive to methane activation, but also enhanced lattice oxygen migration in the oxygen carrier. A suitable reaction temperature could match methane activation with lattice oxygen migration, thereby improving the selectivity of the oxygen carrier. Experimental results showed that performance of the oxygen carrier was in the optimal when CeO₂ content was 10% and reaction temperature was 850 ºC. CH₄ conversion rate could reach 94%, H₂ selectivity and CO selectivity could reach 90% and 83%, respectively. The oxygen carrier 10%CeO₂/LaFeO₃ could maintain stable reaction performance and structure in the redox cycles.
- methane,
- chemical looping reforming,
- syngas,
- oxygen carrier,
- selectivity

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References(38)

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