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The desorption of O2 during NO and N2O decomposition on Cu- and Fe-zeolites

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Abstract

The decomposition of NO and of N2O over a CuZSM-5 zeolite and a Fe-mordenite, respectively, has been studied using tracer techniques. The results demonstrate the high mobility of the lattice oxygen ions in self-diffusion. They afford a possible explanation for the problem of how two extralattice oxygens located at positions remote from each other may combine to form the O2 molecules which are spontaneously desorbed in these redox reactions. They show that a portion of the lattice oxygen mixes into the O2 released on decomposition. The data also show that N18O and N2 18O undergo exchange with the catalyst oxygen under reaction conditions.

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Authors and Affiliations

  1. Department of Chemistry, University of Pittsburgh, 15260, Pittsburgh, PA, USA

    Jozsef Valyon & W. Keith Hall

  2. Department of Chemistry, University of Wisconsin-Milwaukee, WI53201, Milwaukee, USA

    W. S. Millman

Authors
  1. Jozsef Valyon
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  2. W. S. Millman
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  3. W. Keith Hall
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On leave from Central Research Institute for Chemistry, Hungarian Academy of Sciences, H-1525 Budapest, Hungary.

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Valyon, J., Millman, W.S. & Hall, W.K. The desorption of O2 during NO and N2O decomposition on Cu- and Fe-zeolites. Catal Lett 24, 215–225 (1994). https://doi.org/10.1007/BF00811794

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  • DOI: https://doi.org/10.1007/BF00811794

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