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Longyu Wen, Zhiqiang Li, Nina Chen, Jiangyong Yuan, Yuelun Li, Lei Jiang, Hua Wang, Kongzhai Li. Enhanced coal tar-resistance of LaFeO3-based oxygen carrier for chemical looping reforming of coke oven gas. Green Energy&Environment. doi: 10.1016/j.gee.2026.01.004
Citation: Longyu Wen, Zhiqiang Li, Nina Chen, Jiangyong Yuan, Yuelun Li, Lei Jiang, Hua Wang, Kongzhai Li. Enhanced coal tar-resistance of LaFeO3-based oxygen carrier for chemical looping reforming of coke oven gas. Green Energy&Environment. doi: 10.1016/j.gee.2026.01.004
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Enhanced coal tar-resistance of LaFeO3-based oxygen carrier for chemical looping reforming of coke oven gas

doi: 10.1016/j.gee.2026.01.004

  • a. Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;

  • b. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;

  • c. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

Funds:

D Special Project of Yunnan Province (No: 202302AG050005).

This work was financially supported by the National Natural Science Foundation of China (Nos. 52174279, U2202251 and 52266008) and Major R&

  • Received date 29 October 2025, Accepted date 07 January 2026, RevRecd date 15 December 2025, Available online 12 January 2026
    Abstract
  • Chemical looping reforming of coke oven gas (COG) is a promising technology for producing cheap hydrogen, but the presence of coal tar with relatively high concentration presents an enormous challenge for the design of oxygen carriers. In the present work, the effect of naphthalene (a coal tar model compound) on the activity and structure stability of LaFeO3-based perovskite oxygen carriers for chemical looping reforming of COG were investigated. We found that the presence of naphthalene would inhibit the methane conversion and lead to serious carbon deposit on oxygen carriers, thus reducing the structure stability during the redox cycling. In response to the aforementioned findings, a series of La1-xYxFe0.93Ni0.07O3-λ perovskite oxygen carriers were designed based on co-doping of A and B sites strategy. The presence of Ni2+ at B-site can improve the capacity of oxygen carrier for methane activation, and the Y3+ substitution at A-site may enhance the activity of lattice oxygen via regulating the Fe-O bond-length. With a suitable content of Ni and Y, the La0.9Y0.1Fe0.93Ni0.07O3-λ oxygen carrier shows superior performance for chemical looping reforming of COG, with the CH4 conversion higher than 99% and excellent stability during long-term redox cycles in the presence of 400 ppm naphthalene at 800 °C. This work may provide a viable strategy for developing robust perovskite oxygen carriers for the chemical looping reforming of fuels with relativity high content of impurities.

     

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