This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improvements in Pd:Rh and Pt:Rh Three Way Catalysts
Technical Paper
1999-01-0308
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
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.Also In
References
- Cowley, A Platinum 1998 Johnson Matthey May 1998
- Hepburn J.S. Patel K.S. Meneghel M.G. Gandhi H.S. Engelhard TWC Dev. Team Johnson Matthey TWC Dev. Team “Development of Pd-only Three Way Catalyst Technology” SAE 941058 1994
- Brisley R.J. Chandler G.R. Jones H.R. Andersen P.J. Shady P.J. “The Use of Palladium in Advanced Catalysts” SAE 950259 1995
- Hu Z. Heck R.M. “High Temperature Ultra Stable Close-Coupled Catalysts” SAE 950254 1995
- Thoss J.E. Rieck J.S. Bennett C.J. “The Impact of Fuel Sulfur Level on FTP Emissions - Effect of PGM Catalyst Type” SAE 970737 1997
- Collins N.R. Chandler G.R. Brisley R.J. Andersen P.J. Shady P.J. Roth S.A. “Catalyst Improvements to Meet European Stage III and ULEV Emissions Criteria” SAE 960799 1996
- Nunan J.G. Williamson W.B. Robota H.J. Henk M.G. “Impact of Pt-Rh and Pd-Rh Interactions on Performance of Bimetal Catalysts” SAE 950258 1995
- Punke A. Dahle U. Tauster S.J. Rabinowitz H.N. Yamada T. “Trimetallic Three-Way Catalysts” SAE 950255 1995
- Becker E.R. Watson R.J. “Future Trends in Automotive Emission Control” SAE 980413 1998
- Zhang G. Hirota T. Hosokawa Y. Muraki M. “Thermally Stable Pt/Rh Catalysts SAE 972909 1997
- Lakis R.E. Cai Y. Stenger, H.G. Jr. Lyman C.E. “Alumina-Supported Pt-Rh Catalysts” J. Catal. 154 276 1995
- Hu Z. Allen F.M. Wan C.Z. Heck R.M. Steger J.J. Lakis R.E. Lyman C.E. “Performance and Structure of Pt-Rh Three-Way Catalysts: Mechanism for Pt/Rh Synergism” J. Catal. 174 13 1998