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Achieving Heavy-Duty Diesel NOx/PM Levels Below the EPA 2002 Standards--An Integrated Solution
Technical Paper
2000-01-0187
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
The diesel engine has long been the most energy efficient powerplant for transportation. Moreover, diesels emit extremely low levels of hydrocarbon and carbon monoxide that do not require post-combustion treatment to comply with current and projected standards. It is admittedly, however, difficult for diesel engines to simultaneously meet projected nitrogen oxides and particulate matter standards. Traditionally, measures aimed at reducing one of these two exhaust species have led to increasing the other. This physical characteristic, which is known as NOx/PM tradeoff, remains the subject of an intense research effort.
Despite this challenge, there is significant evidence that heavy-duty highway engine manufacturers can achieve substantial emission reductions. Many development programs carried out over the last five years have yielded remarkable results in laboratory demonstrations. Yet, even with the progress achieved thus far it is evident that engine design measures alone will fall short of meeting future NOx/PM emissions limits.
In the meantime, many advances were achieved in diesel exhaust post-combustion emission control devices (after-treatment) technology. Selective catalytic reduction (SCR), used in the past to reduce NOx from large industrial installations, is now being developed for heavy-duty on-highway diesel engines. Diesel particulate filters (DPF), which are known for their ability in reducing PM, have previously suffered from regeneration, reliability, and durability problems. Now they are being included in plans for serial production. In their advanced development and planned production configurations, both technologies depend heavily on engine speed, load, exhaust temperature, and other characteristics. In fact, the move to integrate engine and post-combustion emission control devices (PC-ECD) into one overall emission control system is gaining popularity.
This paper describes the application of SCR and DPF technology to a heavy-duty on-highway diesel engine. Regeneration of the DPF was further enhanced with a cerium-based fuel-borne catalyst, which reduced the ignition temperature of the collected particulate. Results of this development effort not only met the 2002 EPA heavy-duty diesel NOx and PM standards, but went beyond these requirements to achieve less than 1.5 and 0.05 g/bhp-hr respectively, for these pollutants. Detailed accounting of engine- and DPF-out cerium is also provided.
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Khair, M., Lemaire, J., and Fischer, S., "Achieving Heavy-Duty Diesel NOx/PM Levels Below the EPA 2002 Standards--An Integrated Solution," SAE Technical Paper 2000-01-0187, 2000, https://doi.org/10.4271/2000-01-0187.Also In
References
- Gill, A. P. “Design Choices for 1990's Low Emission Diesel Engines,” SAE Paper 880350 February 29 March 4 1988
- Clerc, J. C. Miller, R. K. McDonald, A. C. Schlamadinger, H. “A Diesel Engine/Catalyst System for Pick-up and Medium-Duty Trucks” SAE Paper 932982 November 1-4 1993
- Ball, D. J. Stack, R. G. “Catalyst Considerations for Diesel Converters,” SAE Paper 902110 October 22-25 1990
- Kojetin, P. Janezich, F. Sura, L. Tuma, D. “Production Experience of a Ceramic Wall Flow Electric Regeneration Diesel Particulate Trap,” SAE Paper 930129 1993
- Wyatt, M. Manning, W. A. Roth, S. A. D'Aniello, M. J. Jr. Andersson, E. S. Fredholm, S. C. G. “The Design of Flow-Through Diesel Oxidation Catalysts,” SAE Paper 930130 1993
- Khair, M. K. “Diesel Particulate Analysis for Effective Exhaust Aftertreatment,” SAE Paper 932954 November 1-4 1993
- Krutzsch B. Wenninger, G. “Effect of Sodium- and Lithium-Based Fuel Additives on the Regeneration Efficiency of Diesel Particulate Filters,” SAE Paper 922188m October 19-22 1992
- Rao, C. D. N. Cikanek, H. A. Horrocks, R. W. “Diesel Particulate Control System for Ford 1.8L Sierra Turbo-Diesel to Meet 1997-2003 Particulate Standards,” SAE Paper 940458 1994
- Stiglic, P. Bagelman, B. Hundemer, R. “Emission Testing of Two Heavy-Duty Diesel Engines Equipped with Exhaust Aftertreatment,” SAE Paper 900919 April 3-5 1990
- Newkirk, M. S. “Application of Methods for Determining Total Organic Contribution to Diesel Particulates,” ASME Paper 92-ICE-16 January 26-30 1992
- SwRI Project 08-1854
- Fritz N. Mathes W. Zuerbig J. Mueller R. “On-Road Demonstration of NO x Emission Control for Diesel Trucks with SINO x Urea SCR System,” SAE Paper 1999-01-0111 March 1-4 1999