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Development of a Desulfurization Strategy for a NOx Adsorber Catalyst System
Technical Paper
2001-01-0510
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The aggressive reduction of future diesel engine NOx emission limits forces the heavy- and light-duty diesel engine manufacturers to develop means to comply with stringent legislation. As a result, different exhaust emission control technologies applicable to NOx have been the subject of many investigations. One of these systems is the NOx adsorber catalyst, which has shown high NOx conversion rates during previous investigations with acceptable fuel consumption penalties. In addition, the NOx adsorber catalyst does not require a secondary on-board reductant.
However, the NOx adsorber catalyst also represents the most sulfur sensitive emissions control device currently under investigation for advanced NOx control. To remove the sulfur introduced into the system through the diesel fuel and stored on the catalyst sites during operation, specific regeneration strategies and boundary conditions were investigated and developed. To achieve the required exhaust temperature under slightly rich conditions, a pre-catalyst may be required. Under constant engine operating conditions, the duration of the desulfurization process was varied to determine the required desulfurization period. In addition, the catalysts were aged and periodically desulfurized to determine the influence of multiple desulfurization events on long-term catalyst performance.
The test results show that using a pre-catalyst, the NOx conversion capability of a NOx adsorber catalyst can be restored even after multiple desulfurizations. However, a decline in conversion efficiency can be observed over time. In anticipation of future catalyst improvements, it can be concluded, that the adsorber catalyst is a promising technology for future vehicle applications.
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Authors
- Sam Geckler - FEV Engine Technology, Inc.
- Dean Tomazic - FEV Engine Technology, Inc.
- Volker Scholz - FEV Motorentechnik GmbH
- Margaret V. Whalen - National Renewable Energy Laboratory
- Dale McKinnon - MECA
- John Orban - Battelle
- Robert A. Gorse - Ford Motor Co.
- Owen Bailey - ASEC
- James C. Hoelzer - Detroit Diesel
Topic
Citation
Geckler, S., Tomazic, D., Scholz, V., Whalen, M. et al., "Development of a Desulfurization Strategy for a NOx Adsorber Catalyst System," SAE Technical Paper 2001-01-0510, 2001, https://doi.org/10.4271/2001-01-0510.Also In
Diesel Exhaust Emissions Control: Developments in Regulation and Catalytic Systems
Number: SP-1581; Published: 2001-03-05
Number: SP-1581; Published: 2001-03-05
References
- Parks, J.E. Wagner G.J. Epling W.E. Sanders M.W. Campbell L.E. “NO x Sorbate Catalyst System with Sulfur Catalyst Protection for Aftertreatment of No. 2 Diesel Exhaust” SAE Paper 1999-01-3557 1999
- Luders, H. Stommel P. Geckler S. “Diesel Exhaust Aftertreatment - New Approaches to Ultra Low Emission Diesel Vehicles” SAE Paper 1999-01-0108 1999
- Asanuma, T. Takeshima S. Yamashita T. Tanaka T. Murai T. Iguchi S. “Influence of Sulfur Concentration in Gasoline on NO x Storage - Reduction Catalyst” SAE Paper 1999-01-3501 1999
- Guyon, M. Blejean F. Bert C. Le Faou Ph. “Impact of Sulfur on NO x Trap Catalyst Activity - Study of Regeneration Conditions” SAE Paper 982607 1998
- Muller, W. Strehlau W. Hoehne J. Okumura A. Gobel U. Lox W. Hori M. “Durability Aspects of NO x Adsorption Catalysts for Direct Injection Gasoline Vehicles with Regard to European Application” SAE Paper 1999-01-1285 1999
- Diesel Emission Control - Sulfur Effects (DECSE) Program “Phase I Interim Data Report No. 2: NO x Adsorber Catalysts” U. S. Department of Energy 1999