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Catalyst Selection for Lean Combustion Engines
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English
Abstract
A modeling procedure for selecting exhaust gas oxidation catalysts was applied to a lean air/fuel, high compression engine. The procedure was used to select the lowest cost catalyst that could meet given CVS C/H emission targets. The procedure consisted of 1) aging a variety of oxidation catalysts using an engine dynamometer, 2) measuring the conversion efficiencies of the aged catalysts during increasing and steady temperature conditions, 3) determining relevant properties of the exhaust gas at the catalyst inlet, 4) determining the activity parameters for oxidizing hydrocarbons. HC, and carbon monoxide, CO, on the aged catalysts, 5) predicting vehicle CVS HC and CO emissions as a function of catalyst volume, and 6) determining the most cost effective catalyst to meet a given CVS emission level as a function of the precious metal used, its concentration, the catalyst volume, and their incremental costs. The results of this procedure are valid only for the vehicle, catalysts and catalyst aging procedure used.
Authors
Citation
Vaughen, M. and Hammerle, R., "Catalyst Selection for Lean Combustion Engines," SAE Technical Paper 872133, 1987, https://doi.org/10.4271/872133.Also In
References
- Germane G. J. Wood C. G. Hess C. C. “Lean Combustion in Spark-Ignited Internal Combustion Engines - A Review,” SAE Paper No. 831217 1983
- Kaiser E. W. Rothschild W. G. Lavoie G. A. “The Effect of Fuel and Operating Variables on Hydrocarbon Species Distributions in the Exhaust from a Multicylinder Engine,” Combustion Sci. and Tech. 32 245 1983
- Keo J. C. W. Morgan C. R. Lasson H. G. “Mathematical Modeling of CO and HC Catalytic Converter System,” SAE Transactions 80 1971 SAE Paper No. 710289 1971
- Otto N. C. LeGrey W. J. “Mathematical Models for Catalytic Converter Performance,” SAE Paper No. 800841 1980
- Otto N. C. op. cit.
- Kaiser E. W. op. cit.
- Durability Driving Schedule Federal Register 42 124 32906 June 28 1977
- Otto N. C. op. cit.
- Kaiser E. W. op. cit.