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In situ time-resolved FTIR investigation on the reaction mechanism of partial oxidation of methane to syngas over supported Rh and Ru catalysts

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Chinese Science Bulletin

Abstract

In situ time-resolved FTIR spectroscopy was used to study the reaction mechanism of partial oxidation of methane (POM) to synthesis gas and the reaction of CH4/O2/He (2/1/45, molar ratio) gas mixture with adsorbed CO species over Rh/SiO2, Ruγ-Al2O3 and Ru/SiO2 catalysts at 500–600°C. It was found that CO is the primary product of POM reaction over reduced and working state Rh/SiO2 catalysts. Direct oxidation of CH4 is the main pathway of synthesis gas formation over Rh/SiO2 catalyst. CO2 is the primary product of POM over Ru/gg-Al2O3 and Ru/SiO2 catalysts. The dominant reaction pathway for synthesis gas formation over Ruγ-Al2O3 catalyst is via the reforming reactions of CH4 with CO2 and H2O. For the POM reaction over Rh/SiO2 and Ru/gg-Al2O2 catalysts, consecutive oxidation of surface CO species is an important pathway of CO2 formation.

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Authors and Affiliations

  1. Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Institute of Physical Chemistry, Xiamen University, 361005, Xiamen, China

    Weizheng Weng, Mingshu Chen, Qiangu Yan, Zisheng Chao, Yuanyan Liao & Huilin Wan

  2. Department of Chemistry, Zhejiang Normal University, 321004, Jinhua, China

    Tinghua Wu

Authors
  1. Weizheng Weng
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  2. Mingshu Chen
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  3. Qiangu Yan
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  4. Tinghua Wu
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  5. Zisheng Chao
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  6. Yuanyan Liao
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  7. Huilin Wan
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Corresponding author

Correspondence to Huilin Wan.

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Weng, W., Chen, M., Yan, Q. et al. In situ time-resolved FTIR investigation on the reaction mechanism of partial oxidation of methane to syngas over supported Rh and Ru catalysts. Chin. Sci. Bull. 45, 2236–2240 (2000). https://doi.org/10.1007/BF02886360

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  • DOI: https://doi.org/10.1007/BF02886360

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