This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improvements In Converter Durability and Activity via Catalyst Formulation
Annotation ability available
Sector:
Language:
English
Abstract
The performance data for monolithic ceramic converters, to date, shows that fuel management, engine characteristics, substrate design, catalyst formulation, substrate/coating interaction, and packaging design have a profound influence on converter durability and sustained activity and that certain trade-offs are necessary to optimize the overall performance of the converter system. This paper concentrates on the effect of the catalyst system on light-off performance, steady state conversion efficiency, pressure drop, high temperature strength, and thermal shock resistance. The physical properties and engine test data for Corning's EX-20, 400/6 square cell substrate with two different catalyst formulations, production high-tech vs advanced high-tech, show that the advanced catalyst results in marked improvement in mechanical durability and catalytic activity over that achievable with the production catalyst due to improved substrate/coating interaction.
Recommended Content
| Technical Paper | Performance and Durability of Advanced Ceramic Catalyst Supports |
| Technical Paper | A Study of the Durability of Diesel Oxidation Catalysts |
Authors
Topic
Citation
Guiati, S., summers, J., Linden, D., and White, J., "Improvements In Converter Durability and Activity via Catalyst Formulation," SAE Technical Paper 890796, 1989, https://doi.org/10.4271/890796.Also In
References
- Gulati S. T. “Long-Term Durability of Ceramic Honeycombs for Automotive Emissions Control” SAE Paper 850130 February 1985
- Gulati S. T. “Effects of Cell Geometry on Thermal Shock Resistance of Catalytic Monoliths” SAE Paper 750171 February 1975
- Gulati S. T. Pujari V. K. “Mechanical Integrity of Ceramic Monolithic Converters” SAE Paper 811324 November 1981
- Kattge D. “Advanced Canning Systems for Ceramic Monoliths in Catalytic Converters” SAE Paper 880284 February 1988
- Gulati S. T. Schneider G. “Mechanical Strength of Cellular Ceramic Substrates” ENVICERAM ‘88 Meeting Deutsche Keramische Gasellschaft E.V. CologneW. Germany December 1988
- Oser P. Volker H. “Optimization of Catalyst Systems with Emphasis on Precious Metal Usage” SAE Paper 872096 November 1987
- Engler B. H. Koberstein E. Volker H. “Three-way Catalyst Performance Using Minimized Rhodium Loadings” SAE Paper 872097 November 1987
- Williamson W. B. Summers J. C. Skowron J. F. “Catalyst Technologies for Future Automotive Emission Systems” SAE Paper 380103 February 1988
- Summers J. C. Williamson W. B. Henk M. G. “Uses of Palladium in Automotive Emission Control Catalysts” SAE Paper 880281 February 1988
- Summers J. C. Hegedus L. L. “Effects of Platinum and Palladium Impregnation on the Performance and Durability of Automobile Exhaust Oxidizing Catalysts” J. Catalysis 51 185 1978