Comprehensive Technological Development of Innovative, Next-Generation, Low-Pollution Vehicles - 2 Dimensional Urea SCR Computational Fluid Dynamics Simulation Accounting for Surface Reactions and Diffusion in the Catalyst Layer

摘要

The chemically reacting flow in unit cell channel of the Urea SCR catalyst was simulated by using the CFD code. In the numerical study, six teens not only surface elementary chemical reactions including reactions associated with NH{sub}3 adsorption/desorption and NO{sub}x purification but also diffusivities in the catalyst layer were taken into account. The effect of porosity and the density of active metals in the catalyst layer on performance of the SCR catalyst were investigated. As a result, we show that the present methodology is a good tool for designing the catalyst.