TECHNICAL PAPERS

Advanced Low Platinum Group Metal Three-Way Catalysts for Tier 2 and LEV II Compliance

Date Published: 2001-03-05
Paper Number: 2001-01-0659

Author(s):


Steve J. Golden - Catalytic Solutions Inc.
Andrew Polli - Catalytic Solutions Inc.
Randal Hatfield - Catalytic Solutions Inc.
Michael G. Cotton - Catalytic Solutions Inc.
Timothy J. Truex - Catalytic Solutions Inc.

Abstract

A breakthrough catalyst technology utilizing new mixed metal oxides in conjunction with Platinum Group Metals has been developed. Stable synergies are designed into the catalyst washcoat that enable high performance and durability to be achieved at low Platinum Group Metal usage. Extensive vehicle data is reported on catalysts aged using a variety of high-temperature accelerated aging cycles. Vehicle performance at the LEV, ULEV and LEV-II levels is discussed in the context of unique calibration-catalyst interactions. Conclusions concerning further areas of improvement and future applications are also reviewed.

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References

  1. Becker E. R. and Watson R. J., “Future Trends in Automotive Emission Control”, SAE 980413(1998).
  2. Hepburn J. S., Patel K. S., Meneghel M. G,, Gandhi H. S., Engelhard Dev. Team, Johnson Matthey Dev. Team, “Development of Pd-only Three Way Catalyst Technology”, SAE 941058(1994).
  3. Cuif J. P., Blanchard G., Touret O., Seigneurin A., Marczi M., Quemere E., “(Ce,Zr)O2 Solid Solutions for Three Way Catalysts”, SAE 970463(1997).
  4. Platinum 2000, Matthey Johnson, May 2000.
  5. Anderson P. J. and Ballinger T. H., “Improvements in Pd:Rh and Pt:Rh Three Way Catalysts”, SAE 1999-01-0308(1999).
  6. Nagashima K., Zhang G., Hirota T., and Muraki H., “The Effect of Aging Temperature on Catalyst Performance of Pt/Rh and Pd/Rh TWCs”, SAE 2000-01-1954(2000)>

Product Status: In Stock

See papers presented at SAE 2001 World Congress, March 2001, Detroit, MI, USA, Session: Stoichiometric Emission Control Systems for LEV-II and Beyond

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