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Influence of Physical and Chemical Parameters on the Conversion Rate of a Catalytic Converter: A Numerical Simulation Study
Technical Paper
2000-01-0211
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE 2000 World Congress
Language:
English
Abstract
Monolithic three-way catalysts are applied to reduce the emission of combustion engines. The design of such a catalytic converter is a complex process involving the optimization of different physical and chemical parameters. Simple properties such as length, cell densities or metal coverage of the catalysts influence the catalytic performance of the converter.
Numerical simulation is used as an effective tool for the investigation of the catalytic properties of a catalytic converter and for the prediction of the performance of the catalyst. To attain this goal, a two-dimensional flow field description is coupled with a detailed chemical reaction model.
In this paper, results of the simulation of a monolithic single channel are shown. In a first step, the steady state flow distribution was calculated by a two dimensional simulation model. Subsequently, the reaction mechanism of the chemical species in the exhaust gas was added to the simulation process. The performance of the catalyst was simulated under lean, nearly stoichiometric and rich conditions. For these characteristic conditions, the oxidation of propen and CO and the reduction of NO on a typical Pt/Rh coated three-way catalyst were simulated as a function of temperature. The numerically predicted conversion data are compared with experimentally measured data. The simulation further reveals the coupling between chemical reactions and transport processes within the monolithic channel.
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Citation
Braun, J., Hauber, T., Többen, H., Zacke, P. et al., "Influence of Physical and Chemical Parameters on the Conversion Rate of a Catalytic Converter: A Numerical Simulation Study," SAE Technical Paper 2000-01-0211, 2000, https://doi.org/10.4271/2000-01-0211.Also In
Exhaust Aftertreatment Modeling and Gasoline Direct Injection Aftertreatment
Number: SP-1533; Published: 2000-03-06
Number: SP-1533; Published: 2000-03-06
References
- Koltsakis G.C. Konstantinidis P.A. Stamatelos A.M. “Development and application range of mathematical models for 3-way catalytic converters” Appl. Catal. B 12 161 1997
- Kirchner T. Eigenberger G. “On the dynamic behavior of automotive catalysts” Catal. Today 28 3 1997
- Ansell G.P. Bennett P.S. Cox J.P. Frost J.C. Gray P.G. Jones A.-M. Rajaram R.R. Walker A.P. Litorell M. Smedler G. “The development of a model capable of prediciting diesel lean NOx catalyst performance under transient conditions” Appl. Catal. B 10 183 1996
- Boehman A.L. “Numerical Modeling of NO Reduction Over Cu-ZSM-5 Under Lean Conditions” SAE 970752
- Montreuil C.N. Williams S.C. Adamczyk A.A. “Modeling Current Generation Catalytic Converters: Laboratory, Experiments and Kinetic Parameter Optimization-Steady State Kinetics” SAE 920096
- Jeong S.-J. Kim W.-S. “A Numerical Approach to Investigate Transient Thermal and Conversion Characteristics of Automotive Catalytic Converter” SAE 980881
- FLUENT 4.4 Fluent Inc. Lebanon, NH 1997
- DETCHEM Deutschmann O. IWR, University of Heidelberg Germany 1998
- Deutschmann O. Schmidt L.D. “Modeling the Partial Oxidation of Methane in a Short-Contact-Time Reaction” AIChE Journal 44 11 2465 1998
- Baerns M Hofmann H. Renken A. “Chemische Reaktionstechnik” Georg Thieme Verlag Stuttgart New York 1 1992
- Deuflhard P. Hairer E. Zugk J. “One-Step and Extrapolation Methods for Differential-Algebraic Systems” Num. Math. 51 501 1987
- Rogermond E. Essayem N. Frety R. Perrichon V. Primet M. Chevrier M. Gouthier C. Mathis F. “Characterization of Model Three-Way Catalysts” J. Catal. 186 414 1999
- Deutschmann O. Schmidt R. Behrendt F. Warnatz J. “Numerical Modeling of Catlytic Ignition” Twenty-Sixth Symposium (International) on Combustion The Combustion Institute 1747 Pittsburgh 1996
- Zerkle D.K. Allendorf M.D. Wolf M. Deutschmann O. J. Catal.
- Oh S.H. Fisher G.B. Carpenter J.E. Goodmann W. “Comperative Kinetic Studies of CO-O 2 and CO-NO Reactions over Single Crystals and Supported Rhodium Catalysts” J. Catal. 100 360 1986
- Altman E.I. Gorte R.J. “A Temperature-Programmed Desorption Study of NO on Rh Particles Supported on a-Al 2 O 3 {0001}” J. Catal. 113 185 1988
- Lox E. S. J. Engler B. H. Ertl G. Knoetzinger H. Weitkamp J. “Handbook of Heterogeneous Catalysis” VCH Verlagsgesellschaft Weinheim 4 1586 1997