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Development of a Rapid Sulfation Technique and Fundamental Investigations into Desulfation Process
Technical Paper
2003-01-1162
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Effective implementation of lean NOx trap (LNT) technologies requires the development of desulfation strategies to prevent significant degradation of LNT performance as a result of sulfur poisoning. Key to desulfation investigations is the requirement for a controllable and realistic sulfur loading model.
The use of market based fuels can give inconsistent results due to variation of sulfur levels, and increased engine development times. Traditionally, increasing the sulfur level in the fuel via a specific sulfur based dopant has been used to accelerate the sulfation. This research used a different approach, in which sulfur dioxide was rapidly injected immediately prior to the LNT. The ability to replicate slow sulfur accumulation, as well as the benefits of injection control are demonstrated on a gasoline direct injection spark ignition (DISI) engine with LNT aftertreatment, tested on a dynamic dynamometer facility.
The development of the sulfation injection technique enabled a series of sulfur loads and desulfation (DeSOx) experiments to be run. This study investigated the effect of sulfur loading, LNT temperature, and air:fuel ratio (AFR) on the DeSOx efficiency. The study shows that LNT DeSOx rate is fundamentally linked to the LNT temperature; and that other parameters, such as sulfur load, are far less critical to desorption rate.
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Collier, T., Brogan, M., Retman, P., and Bye, R., "Development of a Rapid Sulfation Technique and Fundamental Investigations into Desulfation Process," SAE Technical Paper 2003-01-1162, 2003, https://doi.org/10.4271/2003-01-1162.Also In
References
- Gregory, D. Marshall, R. A. Eves, B. Dearth, M. Hepburn, J. Brogan, M. Swallows, D. 1999 Evolution of Lean NO x Traps on PFI Lean-burn Engines SAE 1999-01-3498
- Marshall, R. A. Gregory, D. Eves, B. Peirce, G. Taylor, T. Cornish, S. Dearth, M. Hepburn, J. 1999 Optimizing the aftertreatment configuration for NOx regeneration on a lean NO x trap SAE 1999-01-3499
- Brogan, M.S. Brisley, R. J. Walker, A. P. Webster, D. E. Boegner, W. Fekete, N. P. Kraemer, M. Krutzsch, B. Voigtlaender, D. Evaluation of NOx storage catalysts as an effective system for NOx removal from the exhaust gas of lean burn gasoline engines. SAE 952490
- Asik, J.R. Meyer, G.M. Meyer, G.M. 2000 Lean NO x trap desulfation through rapid air fuel modulation SAE 2000-01-1200
- Golovin, A.V. Asik, J. Modelling and experiments for lean NOx trap desulfation by high frequency A/F modulation SAE 2000-01-1201
- Dearth, M. Hepburn, J.S. Thanasiu, E. McKenzie, J.-A. Horne, G.S. Sulfur interaction with lean NOx traps: laboratory and engine dynamometer studies SAE 982595
- Gregory, D. Brett, S. Ketcher, D. Marshall, R. Adachi, M. 1999 Automotive catalyst development using FT-IR spectroscopy and mass spectrometry SAE 1999-08-0175
- Villinger, J. Federer, W. Dornauer, A. Weissnicht, A. Hoenig, M. Mayr, T. 1996 Dynamic monitoring of differentiated hydrocarbons in direct engine exhaust: a versatile tool in engine development SAE 960063
- Akashi, K. Inoue, K. Adachi, M. Ishida, K. Villinger, J. Federer, W. Dornauer, A. 1998 Utilization of a soft ionization mass spectrometer for ultra-high sensitivity and fast response emission measurement SAE 980046
- Bond, G.C. 1962 Catalysis by Metals Academic Press London and New York
- Henk, M.G. White, J.J. Denison, G.W. 1987 Sulfur storage and release from automotive Catalysts SAE 872134