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A Study on Three Way Conversion Catalyst Thermal Deactivation and improvement
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English
Abstract
A study was made into thermal deactivation of Pt/Rh/Ce three way conversion (TWC) catalyst by the use of aging engines, as well as the changes in catalytic properties developed by thermal deactivation. As a result, crystallization of Pt and CeO2 and the accompanied decrease in O2 storage capacity were found as factors resulting from the thermal deactivation.
To minimize the thermal deactivation of the catalyst, CeO2 became a focus of the study and a method to inhibit CeO2 crystallization was pursued. The results of engine high temperature durability testing on improved catalysts employing the new technique confirmed inhibition effects of thermal deactivation.
The study successfully resulted in a new TWC catalyst minimizing thermal deactivation.
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Citation
Funabiki, M. and Yamada, T., "A Study on Three Way Conversion Catalyst Thermal Deactivation and improvement," SAE Technical Paper 881684, 1988, https://doi.org/10.4271/881684.Also In
References
- Gandhi H. S. Piken A. G. Stepien H. K. Shelef M. Delosh R. G. Heyde M. E. SAE Paper 770196 1977
- Berg W. SAE Paper 850384 1985
- Ihara K. Ohkubo K. Niura Y. 4th International Pacific Conference Paper No. 871192 1987
- Stepien H. K. Williamson W. B. Gandhi H. S. SAE Paper 800843 1980
- Wan C. G. Dettling J. C SAE Paper 860566 1986
- Koberstein E. Engler B. SAE Paper 852094 1985
- Scherrer P. Gottinger Nachrichen 2 1918