Practical aftertreatment device model development based on experimental measurements

Petr  Koci, University of Chemistry and Technology, Prague

Development of effective mathematical models for catalytic monoliths is a core issue in computer-aided design of exhaust gas aftertreatment systems. It is obvious that the models have to be tailored for specific applications and there exists no universal, all-purpose model. Different simulation tools are needed during catalyst formulation, design of complete aftertreatment system, and on-board control and diagnostics. This presentation focuses on possible extensions of classical, well established models by less conventional approaches: global reaction kinetics incorporating simplified microkinetic aspects, the use of pre-calculated and tabulated reaction rate and selectivity data, and multi-scale approach to porous catalytic layer. The motivation is to provide detailed and reliable description of physical and chemical processes while minimizing the computational costs for model parametrization and simulations.