This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Investigation of NOx Adsorber Catalyst Deactivation
Annotation ability available
Sector:
Language:
English
Abstract
The understanding of deactivation mechanisms is critical to the development of NOx adsorber catalysts with improved durability. The thermal deactivation of a state-of-the-art Pt/Rh based NOx adsorber catalyst is evaluated following oven agings at 800 and 900°C. Sulfur poisoning during lean/rich cycling is studied as a function of catalyst inlet temperature and SO2 concentration. Complementing these studies utilizing synthetic exhaust gas compositions, deactivation resulting from three different engine aging schedules is examined.
The performance of engine-aged catalysts is evaluated as received, and following desulfurization procedures differing in inlet temperature and air/fuel ratio. The impact of aging schedules on NOx adsorption and three-way catalyst function is discussed with respect to precious metal dispersion, washcoat sintering, as well as sulfur build-up and oil-derived poisonings.
Recommended Content
Authors
Citation
Dou, D. and Bailey, O., "Investigation of NOx Adsorber Catalyst Deactivation," SAE Technical Paper 982594, 1998, https://doi.org/10.4271/982594.Also In
References
- Miyoshi N. Tanizawa T. Takeshima S. Takahashi N. Kasahara K. “Development of NOx Storage-reduction 3-Way Catalyst for Lean Burn Engines” Toyota Technical Review 1995 44 21
- Miyoshi N. Matsumoto S. Katoh J. Tanaka T. Harad J. Taskahashi N. Yokota K. Sugiura M. Kasahara K. “Development of New Concept Three-Way Catalyst for Automotive Lean Bum Engines” SAE Paper 950809 1995
- Brogan M.S. Clark A.D. Briskley RJ. “Recent Progress in NOx Trap Technology” SAE Paper 980933 1998
- Kisenyi J.M. Cumming B. Stark R Marshall R.A. Gibbons E.F. Webb D. Hoost T.E. “Correlation between Dynamometer- and Vehicle-Aged Catalysts for Automotive Lean-Burn Applications” SAE Paper 980934 1998
- Brogan M.S. Brisley R.J. Walker A.P. Webster D.E. Boegner W. Fekete N.P. Kramer M. Krutzsch B. Voightlander D. “Evaluation of NOx Storage Catalysts as an Effective System for NOx Removal from the Exhaust Gas of Lean Burn Gasoline Engines” SAE Paper 952490 1995
- Brogan MS. Brisley R.J. Moore J.S. Clark A.D. “Evaluation of NOx Adsorber Catalysts Systems to Reduce Emissions of Lean Running Gasoline Engines” SAE Paper 962045 1996
- Strehlau W. Leyrer J. Lox E. S. Kreuzer T. Hori M. Hoffman M. “New Development in Lean NOx Catalysis for Gasoline Fueled Passenger Cars in Europe” SAE Paper 962047 1996
- Hepburn J. S. Tanasiu E. Dobson D.A. Watkins W.L. “Experimental and Modeling Investigations of NOx Trap Performance” SAE Paper 96205 1 1996
- Fekete N. Kemmler R. Voighlander D. Krutzsch B. Zimmer E. 'Wenninger G. Strehlau W. van den Tillaart J. AA. Leyrer J. Lox E.S. Muller W. “Evaluation of NOx Storage Catalysts for Lean Bum Gasoline Fueled Passenger Cars” SAE Paper 970746 1997
- Bogner W. Kramer M. Krutzsch B. Pischinger S. Voightlander D. Wenninger G. Wirbeleit F. Brogan M. S. Brisley R J. Webster D. E. “Removal of Nitrogen Oxides from the Exhaust of Lean-Burn Gasoline Engine” Appl. Catal. 1995 153 7
- Bailey O.H. Dou D. Denison G.W. “Regeneration Strategies for NOx Adsorption Catalysts” SAE Paper 972845 1997
- Nunan J.G. Williamson W.B. Robota H. J. Henk M.G. “Impact of Pt-Rh and Pd-Rh Interaction on Performance Features of Bimetal Catalysts” SAE Paper 950258 1994
- Summers J.C. White J.J. Williamson W.B. “Durability of Pd only Three-Way Automotive Emission Control Catalysts” SAE Paper 890794 1989
- Golbstein et. al. “Scanning Electron Microscopy and X-ray Microanalysis” 2nd Plenum Press 1992
- Williamson W.B. Stepien H.K. Gandhi H. S. “Poisoning of Platinum-Rhodium Automotive Three-Way Catalysts: Behavior of Single-Component Catalysts and Effect of Sulfur and Phosphorus” Environ. Science & Technology” 1980 l4 3 19
- Diwell A.F. Hallet C. Taylor J.R “The Impact of Sulfur Storage on emissions from Three-Way Catalysts” SAE Paper 872163 1987