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Mechanistic studies of methane partial oxidation to syngas over LiNiLaOx/Al2O3 catalyst

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Abstract

Temperature-programmed reduction (TPR) characterization of the LiNiLaOx/Al2O3 catalyst before or after partial oxidation of methane (POM) reaction and a series of O2, CH4 and CH4/O2 pulse reaction experiments over the catalyst under different pretreatments were performed. It was found that CH4 dissociatively adsorbs on active center nickel producing H2 and surface carbon, C(a). The surface carbon reacts with surface lattice oxygen or surface adsorbed oxygen to produce CO. Because the activation barrier for the reaction C(a)+ O(a)=CO(a) is the highest among all the elementary reactions, the ratedetermining step of the POM may be the reaction C(a)+O(a)=CO(a).

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Authors and Affiliations

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O.Box 110, 116023, Dalian, P.R.China

    Qing Miao, Guoxing Xiong, Shenglin Liu Shishan Sheng & Yuhong Zhang

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  1. Qing Miao
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  2. Guoxing Xiong
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  3. Shenglin Liu Shishan Sheng
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  4. Yuhong Zhang
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Miao, Q., Xiong, G., Shishan Sheng, S.L. et al. Mechanistic studies of methane partial oxidation to syngas over LiNiLaOx/Al2O3 catalyst. React Kinet Catal Lett 66, 273–279 (1999). https://doi.org/10.1007/BF02475801

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  • DOI: https://doi.org/10.1007/BF02475801

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