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Rapid Thermal Response Catalyst for Treatment of Automotive Exhaust

Published online by Cambridge University Press:  10 February 2011

Robert N. Carter ,
Subir Roychoudhury ,
George Muench ,
Hasan Karim  and
William Pfefferle
Robert N. Carter
Affiliation:
Precision Combustion, Inc., 25 Science Park, Box 24, New Haven, CT 06511, USA
Subir Roychoudhury
Affiliation:
Precision Combustion, Inc., 25 Science Park, Box 24, New Haven, CT 06511, USA
George Muench
Affiliation:
Precision Combustion, Inc., 25 Science Park, Box 24, New Haven, CT 06511, USA
Hasan Karim
Affiliation:
Precision Combustion, Inc., 25 Science Park, Box 24, New Haven, CT 06511, USA
William Pfefferle
Affiliation:
Precision Combustion, Inc., 25 Science Park, Box 24, New Haven, CT 06511, USA
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Abstract

To meet the increasingly strict automobile emissions requirements for conventional vehicles, considerable improvements in catalyst technology are required. It is now recognized that a primary challenge in meeting the ultra-low emissions vehicle standards (ULEV) for automobiles is in reducing cold-start emissions, and this generally requires a catalytic converter that has a rapid temperature response. Conventional converters (typically made from ceramic or metal monoliths) have a relatively slow temperature response due to their high thermal mass and limited heat transfer characteristics. We present details of a novel catalyst technology (Microlith™) that offers considerable advantages for this application because of greatly enhanced heat and mass transfer characteristics. Results of performance tests are also presented that demonstrate this catalyst's effectiveness. The effects of thermal aging on microstructure and catalyst performance are also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 454: Symposium S – Advanced Catalytic Materials–1996 , 1996 , 273
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

[1] Heck, R.M. and Farrauto, R.J., Catalytic Air Pollution Control, Commercial Technology, Van Nostrana Reinhold, New York, 1995, pp. 72–112.Google Scholar
[2] Roychoudhury, S., Hixon, D., Pfefferle, W., Gibbs, R.E., Webster, W.J., Johnson, R., and Wilson, G., SAE Paper 940467, SAE International, Warrendale, PA, 1994.Google Scholar
[3] Roychoudhury, S., Muench, G., Bianchi, J.F., Pfefferle, W.C., and Gonzales, F., SAE Paper 971023, SAE International, Warrendale, PA, 1997.Google Scholar
[4] 1975 Federal Test Procedure, Code of Federal Regulations, Title 40, Part 86.Google Scholar
[5] Ullah, U., Waldram, S.P., Bennett, C.J., and Truex, T., Chem. Eng. Science, 47, p. 2413 (1992).Google Scholar
[6] Satterfield, C.N. and Cortez, D.H., Ind. Chem. Fundam., 9, p. 613 (1970).Google Scholar
[7] Votruba, J., Mikus, O., Nguen, K., Hlavacek, V., and Skrivanek, J., Chem. Eng. Sci., 30, p. 201 (1975).Google Scholar
[8] Locker, R.J., SAE Paper 960262, SAE International, Warrendale, PA, 1996.Google Scholar
[9] Armour, J.C. and Cannon, J.N., AIChE. J., 14, p. 415 (1968).Google Scholar
[10] See for example: Incropora, F.P. and DeWitt, P.P., Introduction to Heat Transfer, John Wiley and Sons, New York, 1985, pp. 174–181.Google Scholar