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A simplified three-way catalyst model for transient hot-mode driving cycles / Dimitrios N. Tsinoglou in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1772–1785 Titre : A simplified three-way catalyst model for transient hot-mode driving cycles Type de document : texte imprimé Auteurs : Dimitrios N. Tsinoglou, Auteur ; Martin Weilenmann, Auteur Année de publication : 2009 Article en page(s) : pp. 1772–1785 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Three-way  catalytic  converters  Real-world  driving  cycles  Oxygen  storage  Heat  transfer  Mass  transfer Résumé : Numerous models for the simulation of chemical phenomena in three-way catalytic converters (3WCCs) have been proposed in the literature, ranging from models of the detailed mechanism of the catalytic reactions on the surface to purely empirical correlations for the pollutant conversion efficiency. The application of these models for transient exhaust-gas conditions, such as real-world driving cycles, usually involves a tradeoff between the chemical background of the model, on one hand, and the computational load and ease of model parametrization on the other. In this work, a simplified mathematical model to simulate pollutant conversion in three-way catalytic converters is developed, that has a low computational load and ease of parametrization as primary priorities, but without completely disregarding the chemical background. The intended application of this model is the simulation of pollutant emissions from pilot fleets of vehicles, under real-world driving cycles, starting with a hot engine. Its main novelty is that it models the complex chemical phenomena in a 3WCC almost entirely on the basis of oxygen storage and release dynamics. One-dimensional simulation of the heat- and mass-transfer phenomena is also included in the model, based on well-established approaches from the literature. The model is validated against a large database of measured driving cycles, performed with different types of passenger cars. It is found to present an acceptable degree of correlation between simulated and experimental results, in terms of both instantaneous and cumulative pollutant emissions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8010325 [article] A simplified three-way catalyst model for transient hot-mode driving cycles [texte imprimé] / Dimitrios N. Tsinoglou, Auteur ; Martin Weilenmann, Auteur . - 2009 . - pp. 1772–1785. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1772–1785 Mots-clés : Three-way  catalytic  converters  Real-world  driving  cycles  Oxygen  storage  Heat  transfer  Mass  transfer Résumé : Numerous models for the simulation of chemical phenomena in three-way catalytic converters (3WCCs) have been proposed in the literature, ranging from models of the detailed mechanism of the catalytic reactions on the surface to purely empirical correlations for the pollutant conversion efficiency. The application of these models for transient exhaust-gas conditions, such as real-world driving cycles, usually involves a tradeoff between the chemical background of the model, on one hand, and the computational load and ease of model parametrization on the other. In this work, a simplified mathematical model to simulate pollutant conversion in three-way catalytic converters is developed, that has a low computational load and ease of parametrization as primary priorities, but without completely disregarding the chemical background. The intended application of this model is the simulation of pollutant emissions from pilot fleets of vehicles, under real-world driving cycles, starting with a hot engine. Its main novelty is that it models the complex chemical phenomena in a 3WCC almost entirely on the basis of oxygen storage and release dynamics. One-dimensional simulation of the heat- and mass-transfer phenomena is also included in the model, based on well-established approaches from the literature. The model is validated against a large database of measured driving cycles, performed with different types of passenger cars. It is found to present an acceptable degree of correlation between simulated and experimental results, in terms of both instantaneous and cumulative pollutant emissions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8010325