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Durability of Monolithic Auto Exhaust Oxidation Catalysts in the Absence of Poisons
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English
Abstract
A study was undertaken to determine the thermal stability, in the absence of poisons, of a PTX®-Type IIB monolithic oxidation catalyst and to demonstrate durability on a vehicle by actual road testing. Effective control of emissions of hydrocarbons and carbon monoxide for 50,000 miles was achieved in the absence of system or engine malfunctions. No increase in carbon monoxide emission and a gradual increase in hydrocarbon emission was seen over this period. The increase in hydrocarbon emission was compared to that observed for a series of catalysts, hydro-thermally aged in the laboratory, indicating that the gradual increase was due primarily to thermal effects.
An analysis of the lead distribution in lead-free gasoline was made, indicating that with 0.05 grams per gallon maximum lead level (per EPA regulations) less than 0.03 grams per gallon would be valid for certification of automobiles.
Authors
- K. Aykan - Engelhard Industries Division, Engelhard Minerals & Chemicals Corporation, Menlo Park, N.J. 08817
- W. A. Mannion - Engelhard Industries Division, Engelhard Minerals & Chemicals Corporation, Menlo Park, N.J. 08817
- J.J. Mooney - Engelhard Industries Division, Engelhard Minerals & Chemicals Corporation, Murray Hill, N.J. 07974
- R. D. Hoyer - Engelhard Industries Division, Engelhard Minerals & Chemicals Corporation, Murray Hill, N.J. 07974
Citation
Aykan, K., Mannion, W., Mooney, J., and Hoyer, R., "Durability of Monolithic Auto Exhaust Oxidation Catalysts in the Absence of Poisons," SAE Technical Paper 730592, 1973, https://doi.org/10.4271/730592.Also In
References
- Aykan K. Hindin S. G. Kenson R. E. Mooney J. J. “Monolithic Catalysts for Auto Exhaust Control - A Progress Report” 22nd Canadian Chemical Engineering Conference Toronto, Canada September 20 1972
- Aykan K. Hindin S. G. Kenson R. E. Mooney J. J. “Monolithic Catalysts for Auto Exhaust Control - A Progress Report-II” American Chemical Society, I. & E. C. Division Symposium Chicago, Illinois January 18 1973
- Yarrington R. M. Bambrick W. E. “Deactivation of Automobile Exhaust Control Catalyst” J. Air Pollution Control Association 20 6 398 1970
- Weaver E. E. “Effects of Tetraethyl Lead on Catalyst Life and Efficiency in Customer Type Vehicle Operation” S.A.E. Meeting, Paper No. 690180 1969
- Gagliardi J. C. Smith C. S. Weaver E. E. “Effect of Fuel and Oil Additives on Catalytic Converters” A.P.I. Division of Refining, 37th Midyear Meeting, Paper No. 63-72 1972
- Hunter J. E. “Studies of Catalyst Degradation in Automotive Emission Control Systems” S. A. E. Meeting, Paper No. 720122 1972
- Environmental Protection Agency “Regulation of Fuels and Fuel Additives” Federal Register 38 6 January 10 1973
- Bowden J. N. “Status of Unleaded and Low-Lead Gasoline Composition” AD 747421, U.S. Army Fuels and Lubricants Research Laboratory Southwest Research Institute San Antonio, Texas August 1972