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Study of the Deactivation of Base Metal Oxide Oxidation Catalyst for Vehicle Emission Control
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
A study was made of the deactivation of a pelletized base metal oxide catalyst which was evaluated in an eight-car fleet for accumulation of up to 18,000 miles in customer-type driving. The fleet test was carried out to determine the effects of two converter locations and four tetraethyl lead levels (0.06-3.17 g/gal) in the fuel on the effectiveness of the catalyst for the control of CO and HC emissions. Samples of the used catalysts were examined to ascertain the changes in BET surface area, size distribution and chemical composition of the contaminants deposited on the catalyst, and the patterns of penetration of lead contaminant. The major changes found in the used catalyst samples were correlated with the activity data obtained by the catalyst manufacturer on duplicate catalyst samples.
The amount of lead deposits found on the catalyst represented about 50% of the lead in the fuel based on an assumed gas mileage of 17 mpg, and was nearly in direct proportion to the lead content in the fuel and independent of converter location. The catalyst activity for CO and HC oxidation was adversely affected by the accumulation of lead deposits.
The major effect due to the converter locations investigated in this study was found in the loss in the catalyst BET surface area. Catalyst samples from front-mounted converters suffered a greater loss of surface area, but a nearly twofold variation in catalyst surface area (50 versus 100 m2/g) had a relatively small effect on the HC oxidation activity.
CitationSu, E. and Weaver, E., "Study of the Deactivation of Base Metal Oxide Oxidation Catalyst for Vehicle Emission Control," SAE Technical Paper 730594, 1973, https://doi.org/10.4271/730594.
- Hill E. F. Cannon W. A. Welling C. E. “Oxidation Catalysts Reduce Hydrocarbons in Automobile Exhaust Gas.” SAE Journal January 1958 36
- Cannon W. A. Welling C. E. “The Application of Vanadia-Alumina Catalysts for the Oxidation of Exhaust Hydrocarbons.” SAE Meeting, Paper No. 29T Detroit, Michigan January 1959
- Innes W. B. Duffy R. “Exhaust Gas Oxidation on Vanadia-Alumina Catalysts.” J. Air Pollution Control Association 11 1961 369
- Cannon W. A. Welling C. E. “Catalytic Oxidation of Automotive Exhausts.” I and EC Product Research and Development 1 September 1962 152
- VanDerveer R. T. Chandler J. M. “The Development of a Catalytic Converter for the Oxidation of Exhaust Hydrocarbons.” SAE National Meeting, Paper No. 29S Detroit, Michigan January 1959
- Bishop R. W. Nebel G. J. “Catalytic Oxidation of Automobile Exhaust Gases - An Evaluation of the Houdry Catalyst.” Paper 29R presented at SAE Annual Meeting Detroit, Michigan January 1959
- Schaldenbrand H. Struck J. J. “Development and Evaluation of Automobile Exhaust Catalytic Converter Systems.” SAE National Automobile and Production Meetings, Paper No. 486E Detroit, Michigan March 1962
- Davis D. L. Onishi G. F. “Catalytic Converter Development Problems.” Paper 486F presented at SAE National Meeting Detroit, Michigan March 1962
- Leak R. J. Brandenburg J. T. Behrens M. D. “Use of Alumina-coated Filaments in Catalytic Mufflers Testing with Multicylinder Engine and Vehicles.” Environmental Science and Technology 2 October 1968 790 794
- Jagel K. J. Dwyer F. G. “HC/CO Oxidation Catalysts for Vehicle Exhaust Emission Control.” Paper 710290 , SAE Meeting Detroit, Michigan January 1971
- Weaver E. E. “Effects of Tetraethyl Lead on Catalyst Life and Efficiency in Customer Type Vehicle Operation.” Paper 690016 , SAE Meeting Detroit, Michigan January 1969
- Gagliardi J. C. Ghannam F. E. “The Effects of Tetraethyl Lead Concentration on Exhaust Emissions in Customer Type Vehicle Operation.” Paper 690015 , SAE National Meeting Detroit, Michigan January 1969
- Bambrick W. E. American Cyanamid Company Letters to E. E. Weaver November 27 1968 May 9 1969
- Yarrington R. M. Bambrick W. E. “Deactivation of Automobile Exhaust Control Catalyst.” J.A.P.C.A. 20 6 1970 398 401
- Fisher G. E. Welling C. E. “Determination of Ammonium Acetate Soluble Lead Compounds in the Presence of Vanadium Pentoxide.” 9th Detroit Anachem Conference 1961
- Shelef M. et al. “Poisoning of Monolithic Noble Metal Oxidation Catalysts in Automobile Exhaust Environment,” AIChE 74th National Meeting New Orleans March 11 15 1973
- Su E. C. Gandhi H. S. “A Study of the Deactivation of Aeroban-V Catalyst.” Unpublished technical memorandum Ford Motor Company