This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Laboratory Study of Lean NOx Trap Desulfation Strategies
Technical Paper
2005-01-1114
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Desulfation characteristics of several model and fully-formulated monolithic lean NOx trap materials were studied in a laboratory flow reactor employing a chemical ionization mass spectrometer. For all samples, desulfation at elevated temperatures under reducing conditions resulted in appearance of sulfur dioxide (SO2) followed by carbonyl sulfide (COS) and hydrogen sulfide (H2S). The data appear consistent with a desulfation mechanism involving elimination of SO2 from stored sulfates under reducing conditions, followed by reaction of the SO2 with CO and H2 to produce COS and H2S, respectively. Based on these observations, several cyclic and multistage desulfation strategies were devised which greatly decreased H2S emissions while achieving relatively rapid and complete sulfur removal.
Recommended Content
Authors
Citation
Ura, J., Goralski, C., Graham, G., McCabe, R. et al., "Laboratory Study of Lean NOx Trap Desulfation Strategies," SAE Technical Paper 2005-01-1114, 2005, https://doi.org/10.4271/2005-01-1114.Also In
References
- Krebs R. Pott E. Kreuzer T.P. Gobel U. Gluck K-H. Exhaust Gas Aftertreatment of Volkswagen FSI Fuel Stratified Injection Engines SAE 2002-01-0346 2002
- Collier T. Brogan M. Retman P. Bye R. Development of a Rapid Sulfation Technique and Fundamental Investigations into Desulfation Process SAE 2003-01-1162 2003
- Theis J.R. Li J.J. Ura J.A. Hurley R.G. The Desulfation Characteristics of Lean NO x Traps SAE 2002-01-0733 2002
- Hodjati Sh. Semelle F. Moral N. Bert C. Rigaud M. Impact of Sulphur on the NO x Trap Catalyst Activity - Poisoning and Regeneration Behaviour SAE 2000-01-1874 2000
- Golovin A. Asik J.R. Modeling and Experiments for Lean NO x Trap Desulfation by High Frequency A/F Modulation SAE 2000-01-1201 2000
- Dearth M.A. Hepburn J.S. Thanasiu E. McKenzie J. Horne G.S. Sulfur Interaction with Lean NO x Traps: Laboratory and Engine Dynamometer Studies SAE 982595 1998
- Monroe D.R. Li W. Desulfation Dynamics of NO x Storage Catalysts SAE 2002-01-2886 2002
- Asik J.R. Meyer G.M. Dobson D. Lean NO x Trap Desulfation Through Rapid Air Fuel Modulation SAE 2000-01-1200 2000
- Asik J.R. Dobson D.A. Meyer G.M. Suppression of Sulfide Emission During Lean NO x Trap Desulfation SAE 2001-01-1299 2001
- Li J. Theis J.R. Chun W. Goralski C.T. Kudla R.J. Watkins W.L. Hurley R.G. Sulfur Poisoning and Desulfation of the Lean NO x Trap SAE 2001-01-2503 2001
- Erkfeldt S. Larsson M. Hedblom H. Skoglundh M. Sulfur Poisoning and Regeneration of NO x Trap Catalysts for Direct-Injection Gasoline Engines SAE 1999-01-3504 1999
- Guyon M. Blejean F. Bert C. Lefaou Ph. Impact of Sulphur on NO x -trap Catalyst Activity. Study of the Regeneration Conditions SAE 982607 1998
- Theis J. Ura J. Goralski C. Jr. Jen H. Thanasiu E. Graves Y. Takami A. Yamada H. Miyoshi S. The Effect of Ceria Content on the Performance of a NO x Trap SAE 2003-01-1160 2003
- Hepburn J.S. Dobson D.A. Hubbard C.P. Otto K. The Pulse Flame Combustor Revisited SAE 962118 1996
- Truex T.J. Interaction of Sulfur with Automotive Catalysts and the Impact on Vehicle Emissions - A Review SAE 1999-01-1543 1999
- Hillaire S. Sharma S. Gorte R.J. Vohs J.M. Jen H.-W. Effect of SO 2 on the Oxygen Storage Capacity of Ceria-based Catalysts Catalysis Letters 70 2000 131 135
- Gorte R.J. Luo T. SO 2 Poisoning of Ceria-Supported, Metal Catalysts “Catalysis by Ceria and Related Materials,” Trovarelli A. Catalytic Science Series 2 Imperial College Press London 2002