This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Development of Advanced 2-Way SCR/DPF Systems to Meet Future Heavy-Duty Diesel Emissions
Technical Paper
2011-01-1140
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Diesel engines have the potential to significantly increase vehicle fuel economy and decrease CO₂ emissions; however, efficient removal of NOx and particulate matter from the engine exhaust is required to meet stringent emission standards. A conventional diesel aftertreatment system consists of a Diesel Oxidation Catalyst (DOC), a urea-based Selective Catalyst Reduction (SCR) catalyst and a diesel particulate filter (DPF), and is widely used to meet the most recent NOx (nitrogen oxides comprising NO and NO₂) and particulate matter (PM) emission standards for medium- and heavy-duty sport utility and truck vehicles. The increasingly stringent emission targets have recently pushed this system layout towards an increase in size of the components and consequently higher system cost. An emerging technology developed recently involves placing the SCR catalyst onto the conventional wall-flow filter. This technology enables reduced aftertreatment system volume and mass when compared to the conventional SCR system architecture. This technology also offers the potential of cost savings and packaging flexibility. In this work, the potential of the Cu/Zeolite-based SCR/DPF technology for meeting future emission standards was evaluated on a heavy-duty diesel engine operating on an engine dynamometer. In addition, a laboratory fixed-bed flow reactor system was used to determine the NH₃ storage characteristics and the SCR performance as a function of soot loading and catalyst aging.
Recommended Content
Authors
Topic
Citation
Tan, J., Solbrig, C., and Schmieg, S., "The Development of Advanced 2-Way SCR/DPF Systems to Meet Future Heavy-Duty Diesel Emissions," SAE Technical Paper 2011-01-1140, 2011, https://doi.org/10.4271/2011-01-1140.Also In
References
- Johnson, T.V. “Review of Diesel Emissions and Control,” SAE Int. J. Fuels Lubr. 3 1 16 29 2010 10.4271/2010-01-0301
- Fujii, S. Asako, T. Yuuki, K. “Studies of Diesel Particulate Filter Performances by a Diesel Engine Simulator,” SAE Technical Paper 2010-01-0813 2010 10.4271/2010-01-0813
- Cavataio, G. Girard, J.W. Lambert, C.K. “Cu/Zeolite SCR on High Porosity Filters: Laboratory and Engine Performance Evaluations,” SAE Technical Paper 2009-01-0897 2009 10.4271/2009-01-0897
- Allansson, R. Blakeman, P.G. Cooper, B.J. Hess, H. et al. “Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System,” SAE Technical Paper 2002-01-0428 2002 10.4271/2002-01-0428
- Guo, G. Warner, J. Cavataio, G. Dobson, D. et al. “The Development of Advanced Urea-SCR Systems for Tier 2 Bin 5 and Beyond Diesel Vehicles,” SAE Technical Paper 2010-01-1183 2010 10.4271/2010-01-1183
- Tronconi, E. et al “NH 3 -NO 2 /NO 2 SCR for Diesel Exhaust Aftertreatment: Reactivity, Mechanism and Kinetic Modeling of Commercial Fe- and Cu-Zeolite Catalysts” 8th International Catalysis for Automotive Pollution Control Brussels 2009
- He, Y. Brown, D.B. Lu, S. Paratore, M.J. et al. “Opportunities and Challenges for Blended 2-Way SCR/DPF Aftertreatment Technologies,” SAE Technical Paper 2009-01-0274 2009 10.4271/2009-01-0274
- Lee, J.H. Paratore, M.J. Brown, D.B. “Evaluation of Cu-Based SCR/DPF Technology for Diesel Exhaust Emission Control,” SAE Int. J. Fuels Lubr. 1 1 96 101 2008 10.4271/2008-01-0072