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A System Simulation Study of the Enhanced-SCR Reaction

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Abstract

This study addresses fundamental and practical aspects of the Enhanced-SCR reaction over a Fe-zeolite SCR catalyst. The key mechanistic steps responsible for the improvement of the DeNOx activity at low temperatures are analysed, and a system simulation model is developed to assess its potential for NOx conversion improvement in heavy-duty aftertreatment systems. It was found that the ammonium nitrate additive can dramatically improve the low-temperature DeNOx activity of a Fe-zeolite catalyst, by generating in situ NO2 readily. Such NO2 can then react in the Fast-SCR reaction, which explains the enhanced low-T SCR activity. The simulation of a complete heavy-duty aftertreatment system with a dedicated AN injection showed the potential of the apparatus, in both cold and hot WHTC.

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Acknowledgments

Financial support from the EU FP7-284909 Project “CORE—CO2 reduction for long distance transport” is gratefully acknowledged.

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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

    F. Marchitti, I. Nova, P. Forzatti & E. Tronconi

  2. IAV GmbH, Carnotstrasse 1, 10587, Berlin, Germany

    S. Adelberg & V. Strots

Authors
  1. F. Marchitti
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  2. I. Nova
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  3. P. Forzatti
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  4. E. Tronconi
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  5. S. Adelberg
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  6. V. Strots
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Corresponding author

Correspondence to V. Strots.

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Marchitti, F., Nova, I., Forzatti, P. et al. A System Simulation Study of the Enhanced-SCR Reaction. Top Catal 59, 913–918 (2016). https://doi.org/10.1007/s11244-016-0568-0

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  • DOI: https://doi.org/10.1007/s11244-016-0568-0

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