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Effect of Air-Fuel Ratio Modulation on Conversion Efficiency of Three-Way Catalysts
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English
Abstract
The widening of the selectivity windows of a three-way catalyst under A/F ratio modulation was shown to result from retention of adsorbed species on catalyst surfaces and their subsequent reaction with gas-phase reactants. A reaction model was developed based on adsorption properties of CO, HC and NOx and by computer simulation, the conversion efficiencies of CO, HC and NOx under A/F ratio modulation were calculated. The calculated and experimental results were in good agreement.
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Authors
Citation
Kaneko, Y., Kobayashi, H., Komagome, R., Hirako, O. et al., "Effect of Air-Fuel Ratio Modulation on Conversion Efficiency of Three-Way Catalysts," SAE Technical Paper 780607, 1978, https://doi.org/10.4271/780607.Also In
References
- Kaneko Y. Kobayashi H. Komagome R. Nakagami T. Fukui T. “Catalyst System Development” Paper 770197 , SAE Automotive Engineering Congress and Exposition Detroit, Michigan 1977
- Mooney J. J. Thompson C. E. Dettling J. C. “Three-Way Conversion Catalysts Parts of the New Emission Control System” Paper 770365 , SAE Automotive Engineering Congress and Exposition Detroit, Michigan 1977
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- Gandhi H. S. Piken A. G. Shelef M. DeLosh R. G. “Laboratory Evaluation of Three-Way Catalysts” Paper 760201 , SAE Automotive Engineering Congress and Exposition Detroit, Michigan 1976
- Kawamoto S. Suzuki H. Tanaka M. Tawara K. Nakayama O. “Lean Three-Way Characteristics of Automotive Precious Metal Catalysts under Modulated A/F Ratio Conditions” SHOKUBAI 19 4 279 1977
- Tanishita I. “Engineering Thermodynamics” Shokabou Tokyo 1971
- Wanke S. E. Dougharty N. A. “Interaction of Hydrogen, Oxygen and Carbon Monoxide with Supported Rhodium” Journal of Catalysis 24 367 1972