Abstract
Urea-SCR systems are getting a lot of attention as a promising NOx reduction technology for diesel engines. We develop an urea-SCR catalytic reaction model with detailed surface chemistry and urea decomposition reactions on the catalyst. The validity of the urea decomposition reaction model is confirmed by the experimental data which is directly measured inside the catalyst converter. This model can successfully predict gas emissions (such as NOx and NH3) for urea-SCR converters under various vehicle test conditions.
