A Study on Three Way Conversion Catalyst Thermal Deactivation and improvement 881684
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.
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. Download Citation
Author(s):
Masaki Funabiki, Teiji Yamada
Affiliated:
Nippon Engelhard, Ltd.
Pages: 12
Event:
1988 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE Transactions Journal of Fuels and Lubricants-V97-3
Related Topics:
Three-way catalysts
Catalysts
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