Enhanced coal tar-resistance of LaFeO_(3)-based oxygen carrier for chemical looping reforming of coke oven gasOA
Chemical looping reforming of coke oven gas(COG)is a promising technology for producing low-cost hydrogen,but the presence of coal tar with relatively high concentration presents a significant 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 LaFeO_(3)-based perovskite oxygen carriers for chemical looping reforming of COG was investigated.We found that the presence of naphthalene would inhibit the methane conversion and lead to serious carbon deposits on oxygen carriers,thus reducing the structure stability during the redox cycling.In response to the aforementioned findings,a series of La_(1-x)Y_(x)Fe_(0.93)Ni_(0.07)O_(3-λ)perovskite oxygen carriers were designed based on co-doping of A and B sites strategy.The presence of Ni^(2+)at B-site can improve the capacity of oxygen carrier for methane activation,and the Y^(3+)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 La_(0.9)Y_(0.1)Fe_(0.93)Ni_(0.07)O_(3-λ)oxygen carrier shows superior performance for chemical looping reforming of COG,with the CH_(4)conversion higher than 99%and excellent stability during long-term redox cycles in the presence of 400 ppm naphthalene at 800℃.This work may provide a viable strategy for developing robust perovskite oxygen carriers for the chemical looping reforming of fuels with relatively high content of impurities.
Longyu Wen;Zhiqiang Li;Nina Chen;Jiangyong Yuan;Yuelun Li;Lei Jiang;Hua Wang;Kongzhai Li
Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming,650093,ChinaEngineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming,650093,China
化学化工
Chemical looping reformingCoal tar-resistanceCoke oven gasHydrogenY-doped LaFe_(0.93)Ni_(0.07)O_(3-λ)
《Green Energy & Environment》 2026 (5)
P.1335-1348,14
financially supported by the National Natural Science Foundation of China(Nos.52174279,U2202251 and 52266008)Major Science and Technology Projects in Yunnan Province(No:202302AG050005).
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