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New Mechanistic Insights in the NH3-SCR Reactions at Low Temperature

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Abstract

The present study is focused on the investigation of the low temperature Standard SCR reaction mechanism over Fe- and Cu-promoted zeolites. Different techniques are employed, including in situ DRIFTS, transient reaction analysis and chemical trapping techniques. The results present strong evidence of nitrite formation in the oxidative activation of NO and of their role in SCR reactions. These elements lead to a deeper understanding of the standard SCR chemistry at low temperature and can potentially improve the consistency of mechanistic mathematical models. Moreover, comprehension of the mechanism on a fundamental level can contribute to the development of improved SCR catalysts.

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Acknowledgments

This manuscript has been co-authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

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Authors and Affiliations

  1. Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milan, Italy

    M. P. Ruggeri, T. Selleri, I. Nova & E. Tronconi

  2. Fuels Engines and Emissions Research Center, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    J. A. Pihl, T. J. Toops & W. P. Partridge

Authors
  1. M. P. Ruggeri
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  2. T. Selleri
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  3. I. Nova
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  4. E. Tronconi
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  5. J. A. Pihl
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  6. T. J. Toops
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  7. W. P. Partridge
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Corresponding author

Correspondence to E. Tronconi.

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Ruggeri, M.P., Selleri, T., Nova, I. et al. New Mechanistic Insights in the NH3-SCR Reactions at Low Temperature. Top Catal 59, 907–912 (2016). https://doi.org/10.1007/s11244-016-0567-1

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  • DOI: https://doi.org/10.1007/s11244-016-0567-1

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