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.
Similar content being viewed by others
References
Forzatti P, Nova I, Tronconi E (2010) Ind Eng Chem Res 49(21):10386
Forzatti P, Nova I, Tronconi E, Kustov A, Thøgersen JR (2012) Catal Today 184:153
Adelberg S, Schirmer S, Monteforte M, Schrade F, Bunar F, Kishi A (2014) SAE Paper 2014-01-1554, SAE
Strots V, Kishi A, Adelberg S, Krämer L (2014) JSAE Paper 20145174, JSAE
Marchitti F, Hemings EB, Nova I, Forzatti P, Tronconi E (2015) Emiss Control Sci Technol 2:1–9
Acknowledgments
Financial support from the EU FP7-284909 Project “CORE—CO2 reduction for long distance transport” is gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
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
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11244-016-0568-0