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An Efficient Oxygen Activation Route for Improved Ammonia Oxidation through an Oxygen-Permeable Catalytic Membrane

Authors

  • Zhengwen Cao,

    1. Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3 A, Hannover 30167 (Germany)
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  • Prof. Dr. Heqing Jiang,

    Corresponding author
    1. Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No.189 Songling Road, 266101 Qingdao (China)
    • Heqing Jiang, Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No.189 Songling Road, 266101 Qingdao (China)===

      Jürgen Caro, Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3 A, Hannover 30167 (Germany)===

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  • Dr. Huixia Luo,

    1. Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3 A, Hannover 30167 (Germany)
    2. Department of Chemistry, Princeton University, Princeton, NJ 08544 (USA)
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  • Dr. Stefan Baumann,

    1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Leo-Brandt-Strasse, 52425 Jülich (Germany)
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  • Dr. Wilhelm A. Meulenberg,

    1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Leo-Brandt-Strasse, 52425 Jülich (Germany)
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  • Dr. Hartwig Voss,

    1. BASF SE, Ludwigshafen 67056 (Germany)
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  • Prof. Dr. Jürgen Caro

    Corresponding author
    1. Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3 A, Hannover 30167 (Germany)
    • Heqing Jiang, Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No.189 Songling Road, 266101 Qingdao (China)===

      Jürgen Caro, Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3 A, Hannover 30167 (Germany)===

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Abstract

Upon using a reactant/oxygen mixture as co-feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co-feed partial oxidation process in packed-bed reactors. In this new configuration, the activation of oxygen is separated from the catalytic oxidation by using an oxygen-permeable membrane to suppress the formation of nonselective surface molecular oxygen species. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. In the oxidation of ammonia to NO, the NO selectivity was improved from 77 to 95 % if a La0.6Sr0.4Co0.2Fe0.8O3–δ oxygen-permeable catalytically active membrane was used at 850 °C instead of a co-feed fixed bed reactor.

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