Improvements in Pd:Rh and Pt:Rh Three Way Catalysts
1999-01-0308
03/01/1999
- Event
- Content
- As one method of meeting current and future emission regulations on vehicles, automakers have increased PGM loadings in three-way catalysts. Engine dynamometer and FTP testing after accelerated engine agings were performed to compare current Pd:Rh and Pt:Rh catalysts with new Pd:Rh and Pt:Rh catalysts. This comparison demonstrated that enhanced three way performance can be obtained in the new catalysts with reduced Pd loadings or with the use of Pt:Rh instead of Pd:Rh. These improved catalysts will reduce the demand for high PGM loadings as well as provide flexibility in the PGM combinations used in exhaust systems.
- Pages
- 7
- Citation
- Andersen, P., and Ballinger, T., "Improvements in Pd:Rh and Pt:Rh Three Way Catalysts," SAE Technical Paper 1999-01-0308, 1999, https://doi.org/10.4271/1999-01-0308.