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Heavy Duty Emission Control System Analysis and Optimization for Future Demands
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2015 by SAE International in United States
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This paper will review several different emission control systems for heavy duty diesel (HDD) applications aimed at future legislations. The focus will be on the (DOC+CSF+SCR+ASC) configuration.
As of today, various SCR technologies are used on commercial vehicles around the globe. Moving beyond EuroVI/US10 emission levels, both fuel consumption savings and higher catalyst system efficiency are required. Therefore, significant system optimization has to be considered. Examples of this include: catalyst development, optimized thermal management, advanced urea dosing calibrations, and optimized SCR inlet NO:NO2 ratios.
The aim of this paper is to provide a thorough system screening using a range of advanced SCR technologies, where the pros and cons from a system perspective will be discussed. Further optimization of selected systems will also be reviewed. The results suggest that current legislation requirements can be met for all SCR catalysts under investigation. The total system performance was highly dependent on the optimization of each SCR catalyst system, targeting at the same time high NOx conversion, low NH3 slip and low N2O formation.
CitationJansson, J., Johansson, Å., Sjovall, H., Larsson, M. et al., "Heavy Duty Emission Control System Analysis and Optimization for Future Demands," SAE Technical Paper 2015-01-0997, 2015, https://doi.org/10.4271/2015-01-0997.
- Zimmermann, F., Gärtner, U., Benz, P., and Lehmann, J., “Global Emission Strategy of the New Mercedes Benz Medium Duty Engines,” Panel Presentation at SAE International Heavy-Duty Emissions Control Symposium, Sep. 2014.
- Kröcher, O. and Elsener, M. “Combination of V2O5/WO3-TiO2, Fe-ZSM5, and Cu-ZSM5 catalysts for the selective catalytic reduction of nitric oxide with ammonia” Industrial & Engineering Chemistry Research, 2008, vol 47, 8588-8593, doi:10.1021/ie800951a.
- Castagnola, M., Caserta, J., Chatterjee, S., Chen, H. et al., “Engine Performance of Cu- and Fe-Based SCR Emission Control Systems for Heavy Duty Diesel Applications,” SAE Technical Paper 2011-01-1329, 2011, doi:10.4271/2011-01-1329.
- Colombo M., Nova I. and Tronconi E. “A comparative study of the NH3-SCR reactions over a Cu zeolite and a Fe-zeolite catalyst” Catalysis Today, 2010, vol 151, 223-230. Doi:10.1016/j.cattod.2010.01.010.
- Kamasamudram, K., Currier, N., Szailer, T., and Yezerets, A., “Why Cu- and Fe-Zeolite SCR Catalysts Behave Differently At Low Temperatures,” SAE Int. J. Fuels Lubr. 3(1):664-672, 2010, doi:10.4271/2010-01-1182.