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TECHNICAL PAPERS: Emissions

Dynamic Response of Automotive Catalytic Converters to Variations in Air-Fuel Ratio

[+] Author and Article Information
T. Shamim, V. C. Medisetty

Department of Mechanical Engineering, The University of Michigan, Dearborn, MI 48128-1491

J. Eng. Gas Turbines Power 125(2), 547-554 (Apr 29, 2003) (8 pages) doi:10.1115/1.1564065 History: Received November 01, 2001; Revised July 01, 2002; Online April 29, 2003
Copyright © 2003 by ASME
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References

Herz, R. K., 1987, “Dynamic Behavior of Automotive Three-Way Emission Control System,” Catalysis and Automotive Pollution Control, Elsevier, Amsterdam, pp. 427–444.
Herz,  R. K., 1981, “Dynamic Behavior of Automotive Catalysts: 1. Catalyst Oxidation and Reduction,” Ind. Eng. Chem. Process Des. Dev., 20, pp. 451–457.
Silveston,  P. L., 1995, “Automotive Exhaust Catalysis Under Periodic Operation,” Catalysis Today,25, pp. 175–195.
Silveston,  P. L., 1996, “Automotive Exhaust Catalysis: Is Periodic Operation Beneficial?” Chem. Eng. Sci., 51, pp. 2419–2426.
Koltsakis,  G. C., and Stamatelos,  A. M., 1999, “Dynamic Behavior Issues in Three-Way Catalyst Modeling,” AIChE J., 45, pp. 603–614.
Shulman, M. A., Hamburg, D. R., and Throop, M. J., 1982, “Comparison of Measured and Predicted Three-Way Catalyst Conversion Efficiencies Under Dynamic Air-Fuel Ratio Conditions,” SAE Paper No. 820276.
Herz,  R. K., Kleta,  J. B., and Sell,  J. A., 1983, “Dynamic Behavior of Automotive Catalysts: 2. Carbon Monoxide Conversion Under Transient Air/Fuel Ratio Condition,” Ind. Eng. Chem. Process Des. Dev., 22, pp. 387–396.
Taylor,  K. C., and Sinkevitch,  R. M., 1983, “Behavior of Automobile Exhaust Catalysts With Cycled Feed Streams,” Ind. Eng. Chem. Process Des. Dev., 22, pp. 45–50.
Schlatter,  J. C., Sinkevitch,  R. M., and Mitchell,  P. J., 1983, “Laboratory Reactor System for Three-Way Automotive Catalyst Evaluation,” Ind. Eng. Chem. Process Des. Dev., 22, pp. 51–56.
Matsunga, S.-I., Yokota, K., Muraki, H., and Fujitani, Y., 1987, “Improvement of Engine Emissions Over Three-Way Catalyst by the Periodic Operation,” SAE Paper No. 872098.
Schlatter,  J. C., and Mitchell,  P. J., 1980, “Three-Way Catalyst Response to Transients,” Ind. Eng. Chem. Process Des. Dev., 19, pp. 288–293.
Cutlip,  M. B., 1979, “Concentration Forcing of Catalytic Surface Rate Processes,” AIChE J., 25, pp. 502–508.
Abdul-Kareem,  H. K., Silveston,  P. L., and Hudgins,  R. R., 1980, “Forced Cycling of the Catalytic Oxidation of CO Over a V2O5 Catalyst—1”, Chem. Eng. Sci., 35, pp. 2077–2084.
Silveston,  P. L., Hudgins,  R. R., Adesina,  A. A., Ross,  G. S., and Feimer,  J. L., 1986, “Activity and Selectivity Control through Periodic Composition Forcing Over Fischer-Tropsch Catalysts,” Chem. Eng. Sci., 41, pp. 923–928.
Cho,  B. K., and West,  L. A., 1988, “Cyclic Operation of Pt/Al2O3 Catalysts for CO Oxidation,” Ind. Eng. Chem. Fundam., 25, pp. 158–164.
Cho,  B. K., 1988, “Performance of Pt/Al2O3 Catalysts in Automobile Engine Exhaust With Oscillatory Air/Fuel Ratio,” Ind. Eng. Chem. Res., 27, pp. 30–36.
Hoebink,  J. H. B. J., Marin,  G. B., and Huinink,  J. P., 1997, “A Quantitative Analysis of Transient Kinetic Experiments: The Oxidation of CO by O2 Over Pt,” Appl. Catal., A, 160, pp. 139–151.
Shamim,  T., Shen,  H., Sengupta,  S., Son,  S., and Adamczyk,  A. A., 2002, “A Comprehensive Model to Predict Three-Way Catalytic Converter Performance,” ASME J. Eng. Gas Turbines Power, 124, pp. 421–428.
Montreuil, C. N., Williams, S. C., and Adamczyk, A. A., 1992, “Modeling Current Generation Catalytic Converters: Laboratory Experiments and Kinetic Parameter Optimization—Steady State Kinetics,” SAE Paper No. 920096.
Otto, N. C., 1984, private communication.
Shamim, T., and Medisetty, V. C., 2001, “Dynamic Response of Automotive Catalytic Converters: The Role of Chemical Kinetic Mechanisms,” Proceedings of the Second Joint Meeting of the U.S. Sections of the Combustion Institute, Combustion Institute, Pittsburgh, PA, Paper No. 274.
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Figures

Grahic Jump Location
Catalyst response to sinusoidal modulations in A/F near stoichiometric operating conditions (mean A/F=14.8, frequency=1 Hz, amplitude=5%)
Grahic Jump Location
Catalyst conversion efficiencies corresponding to A/F of 14.8 (when reached from rich side) during sinusoidal modulations in A/F (mean A/F=14.8, frequency=1 Hz, amplitude=5%)
Grahic Jump Location
Catalyst response to sinusoidal modulations in A/F near rich operating conditions (mean A/F=12.5, frequency=1 Hz, amplitude=5%)
Grahic Jump Location
Catalyst response to sinusoidal modulations in A/F without oxygen storage capacity (mean A/F=14.8, frequency=1 Hz, amplitude=5%)
Grahic Jump Location
Catalyst response to sinusoidal modulations in A/F: effect of oscillation frequencies (a) CO conversion efficiency; (b) HC conversion efficiency; (c) NO conversion efficiency (mean A/F=14.8, amplitude=5%)
Grahic Jump Location
Catalyst CO response to sinusoidal modulations in A/F for different oscillation frequencies (mean A/F=14.8, amplitude=5%)
Grahic Jump Location
Catalyst response to sinusoidal modulations in A/F: effect of oscillation amplitudes (mean A/F=14.8, frequency=1 Hz)
Grahic Jump Location
Catalyst response to step change in A/F: from lean to rich zone (A/F=15 to 14)
Grahic Jump Location
Catalyst response to step change in A/F: from rich to lean zone (A/F=14 to 15)
Grahic Jump Location
Catalyst response to double-step change in A/F: lean excursion for 1 second (A/F=14 to 15 to 14)

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