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Selective Catalytic Oxidation of Ammonia into Dinitrogen over a Zeolite-Supported Ruthenium Dioxide Catalyst

Authors

  • Steven Heylen,

    1. Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteel Arenberg no. 23, 3001 Heverlee Leuven (Belgium), Fax.: (+32) 16321998
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  • Nele Delcour,

    1. Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteel Arenberg no. 23, 3001 Heverlee Leuven (Belgium), Fax.: (+32) 16321998
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  • Prof. Christine E. A. Kirschhock,

    1. Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteel Arenberg no. 23, 3001 Heverlee Leuven (Belgium), Fax.: (+32) 16321998
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  • Prof. Johan A. Martens

    Corresponding author
    1. Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteel Arenberg no. 23, 3001 Heverlee Leuven (Belgium), Fax.: (+32) 16321998
    • Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteel Arenberg no. 23, 3001 Heverlee Leuven (Belgium), Fax.: (+32) 16321998
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Abstract

RuO2@Na-Y zeolite is a highly active catalyst for the selective catalytic oxidation of NH3 into N2 at relatively low temperatures. RuO2@Na-Y zeolite achieved the stoichiometric conversion of NH3 into N2 at 175 °C in the presence of water vapor and CO2. Increasing the reaction temperature led to the formation of more-oxidized reaction products (N2O, NO, and NO2). This catalyst was successfully operated in a cycling mode with alternating ammonia- and oxygen-containing gas streams. As expected, the catalyst was only poorly efficient in the selective catalytic reduction of ammonia.

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