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Simulated Performance of a Diesel Aftertreatment System for U.S. 2010 Application
Technical Paper
2006-01-3551
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An aftertreatment system for medium and heavy-duty diesel engines has been modeled for U.S. 2010 application. The aftertreatment system is comprised of a lean NOx trap (LNT) and an ammonia selective catalytic reduction (SCR) catalyst in series. Descriptions of the fully transient, one-dimensional LNT and SCR models are presented. The models simulate flow, heat transfer, and chemical reactions in the LNT and SCR catalysts. The models can be used to predict catalyst performance over a range of operating conditions and driving cycles.
Simulated results of NOx conversion efficiency, species concentrations, and gas temperature were compared to experimental data for a 13-mode test. The model results showed the LNT-SCR model predicts system performance with reasonable accuracy in comparison to experimental data. Therefore, two model applications were investigated. First, LNT and SCR volumes were varied to examine the effect on NOx conversion efficiency and NH3 production. Second, a long pipe was modeled between the LNT and SCR catalysts to examine the effect of the pipe on the thermal response of the system and SCR NOx conversion efficiency. The design implications of both studies are discussed.
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Citation
Bevan, K. and Taylor, W., "Simulated Performance of a Diesel Aftertreatment System for U.S. 2010 Application," SAE Technical Paper 2006-01-3551, 2006, https://doi.org/10.4271/2006-01-3551.Also In
References
- Hu, H. Reuter, J. Yan, J. McCarthy, J. “Advanced NOx Aftertreatment System and Controls for On-Highway Heavy Duty Diesel Engines” SAE Paper 2006-01-3552 2006
- Depcik, C. Assanis, D. “One-Dimensional Automotive Catalyst Modeling” Progress in Energy and Combustion Science 2005 31 4 308 369
- Wurtzenberger, J.C. Wanker R. “Multi-Scale SCR Modeling, 1D Kinetic Analysis and 3D System Simulation” SAE Paper 2005-01-0948 2005