This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Deactivation of TWC as a Function of Oil Ash Accumulation - A Parameter Study
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
Annotation ability available
The oil ash accumulation on modern three way catalyst (TWC) as well as its influence on catalyst deactivation is evaluated as a parameter of oil consumption, kind of oil additive compound and additive concentration. The oil ash accumulation is characterized by XRF and SEM/EDX in axial direction and into the washcoat depth of the catalyst. The deposition patterns of Ca, Mg, P and Zn are discussed. The catalytic activity of the vehicle and engine bench aged catalysts is measured by performing model gas tests and vehicle tests, respectively. The influence of oil ash accumulation on the lifetime emission behavior of the vehicle is discussed.
|Technical Paper||Raman Studies of Automotive Catalyst Deactivation|
|Technical Paper||Development of Low Light-off Three Way Catalyst|
|Technical Paper||Palladium/Rhodium Dual-Catalyst LEV 2 and Bin 4 Close-Coupled Emission Solutions|
CitationFranz, J., Schmidt, J., Schoen, C., Harperscheid, M. et al., "Deactivation of TWC as a Function of Oil Ash Accumulation - A Parameter Study," SAE Technical Paper 2005-01-1097, 2005, https://doi.org/10.4271/2005-01-1097.
- Eckhoff S., Mueller W., Lindner D., Leyrer J., Kreuzer T., Vent G., Schoen C., Schmidt J., Franz J., “Catalyst Design for High Performance Engines Capable to Fulfill Future Legislation”, SAE Paper 2004-01-1276.
- Beck D.D., Sommers J.W., DiMaggio C.L., Monroe D.R., Frank D.A., “Impact of Oil-Derived Catalyst Poisons on FTP Performance of LEV Catalyst Systems”, SAE Paper 972842 (1997).
- Twigg M.V., Collins N.R., Morris D., O'Connell T.J., Ball I.K., Arrowsmith S., Cassidy L., Wrench P., “The Effect of Phosphorus and Boron Lubricant Oil Additives on Catalyst and Engine Durability” SAE Paper 2004-01-1888.
- Johnson M.D., McCabe R.W., Hubbard C.P., Riley M.J., Kirby C.W., Ball D.J., Tripp G., McDonnell T.F., Lam W.Y., “Effects of Engine Oil Formulation Variables on Exhaust Emissions in Taxi Fleet Service”, SAE Paper 2002-01-2680.
- Schmidt J., Busch M., Waltner A., Enderle C., Heil B., Lindner D., Mueller W., Mussmann L., Lox E.S., Kreuzer T., “Utilization of advanced Pt/Rh TWC technologies for advanced gasoline applications with different cold start strategies”, SAE Paper 2001-01-0927.
- Borland M., Zhao F., “Application of Secondary Air Injection for Simultaneously Reducing Converter-In Emissions and Improving Catalyst Light-Off Performance”, SAE Paper 2002-01-2803.
- Ball D.J., Mohammed A.G., Schmidt W.A., “Application of Accelerated Rapid Aging Test (RAT) Schedules with Poisons: The Effect of Oil Derived Poisons, Thermal Degradation and Catalyst Volume on FTP Emissions”, SAE Paper 972846 (1997).
- Shelef M., Otto K., Otto N.C., “Poisoning of Automotive Catalysts”, Advances in Catalysis, Vol. 27, 311-365.
- Rokosz M.J., Chen A.E., Lowe-Ma C.K., Kucherov A.V., Benson D., Paputa Peck M.C., McCabe R.W., “Characterization of phosphorus-poisoned automotive exhaust catalysts”, Applied Catalysis B: Environ. 33 (2001) 205-215.