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Total Phosphorus Detection and Mapping in Catalytic Converters
Technical Paper
2007-01-4078
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The poisoning of three way catalysts (TWC) by the phosphorus contained in oil formulations containing zinc dialkyldithiophosphate (ZDDP) is examined. Catalysts were exposed to various types of ZDDP and detergents under conditions that were known to reduce performance through phosphorus poisoning without the blocking of sites by formation of glazing. The presence of phosphorus was detected with energy dispersive x-ray spectroscopy (EDX). In addition to analyzing the surface concentration of the phosphorus on the washcoat, the catalyst was cross cut so phosphorus that diffused into the washcoat could be mapped. The total phosphorus in the catalyst could then be calculated. The amount of total phosphorus detected correlated well with the reduced activity of the catalyst as measured by the temperature of 50% conversion. This examination has shown that both the selection of the ZDDP type and detergent can reduce the amount of phosphorus that is absorbed on the surface of the catalyst as well as into the washcoat of the catalyst and therefore reduce its poisoning effects.
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Guevremont, J., Guinther, G., Jao, T., Herlihy, T. et al., "Total Phosphorus Detection and Mapping in Catalytic Converters," SAE Technical Paper 2007-01-4078, 2007, https://doi.org/10.4271/2007-01-4078.Also In
References
- Spearot, J.A. Caracciolo, F. “Engine Oil Phosphorus Effects on Catalytic Converter Performance in federal Durability and High-Speed Vehicle Tests” SAE 770637 1977
- Williamson, W.B. Gandhi, H.S. Heyde, M.E. Zawacki, G.A. “Deactivation of Three-Way Catalysts by Fuel Contaminants: Lead, Phosphorus and Sulfur” SAE 790942 1979
- Heck, R.M. Farrauto, R.J. “Catalytic Air Pollution Control: Commercial Technology” John Wiley & Sons, Inc. New York 1995
- Williamson, W.B. Perry, J. Goss, R.L. Gandhi, H.S. Beason, R.E. “Catalyst Deactivation due to Glaze Formation from Oil-derived Phosphorus and Zinc” SAE 841406 1984
- Kristen, U. Mueller, K. Chasan, D. Gandhi, H.S. Perry, J. Beckwith, E.C. “Use of a Novel Non-Phosphorus Antiwear Additive for Engine Oils” SAE 872080 1987
- Inoue, K. Kurahashi, T. Negishi, T. Akiyama, K. Arimura, K. Tasaka, K. “Effects of Phosphorus and Ash Contents of engines on Deactivation of Monolithic Three-Way Catalysts and oxygen Sensors” SAE 920654 1992
- Culley, S.A. McDonnell, T.F. “The Impact of Passenger Car Motor Oil Phosphorus Levels on Engine Durability, Oil Degradation, and Exhaust Emissions in Field Trial” SAE 952344 1995
- Culley, S.A. McDonnell, T.F. Ball, D.J. Kirby, C.W. Hawes, S.W. “The Impact of Passenger Car Motor Oil Phosphorus Levels on Automotive Emissions Control systems” SAE 961898 1996
- Kumar, S.V. Rogalo, J. Deeba, M. Burk, P.L. Ferrari, V. “Influence of Phosphorus Poisoning on TWC Catalysts” SAE 2003-01-3735 2003
- Selby, T.W. “Development and Significance of the Phosphorus Emission Index of Engine Oils” Proceedings of 13 th International Colloquium Tribology - Lubricants, Materials, and Lubrication Technische Akademie Esslingen Stuttgart/Ostifildern, Germany January 15 17 2002
- Selby, T.W. Bosch, B.J. Fee, D.C. “Phosphorus Additive Chemistry and its effects on the Phosphorus Volatility of Engine Oils” ASTM International October 2005 2 9
- Ueda, F. Sugiyama, S. Arimura, K. Hamaguchi, S. Akiyama, K. “Engine Oil Additive Effects on Deactivation of Monolithic Three-Way Catalysts and Oxygen Sensors” SAE 940746 1994
- 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 2002-01-2680 2002
- Yilmaz, E. Tian, T. Wong, V.W. Heywood, J.B. “The Contribution of Different Oil Consumption Sources to Total Oil Consumption in a Spark Ignition Engine” SAE 2004-01-2909 2004
- Guinther, G.H. Danner, M. “Development of an Engine-Based Catalytic Converter Poisoning Test to Assess the Impact of Volatile-Phosphorus Depletion from Passenger Car Engine Oils” SAE 2007-01-4079 2007