Modeling and Simulation of a Diesel Oxidation Catalyst used in a NOx Storage and Reduction system for Heavy Duty Trucks

The large amount of diesel engines nowadays and the high content in NOx, CO and Hydrocarbons of its exhaust makes necessary the development of new catalyst technologies to reduce these emissions. In this work, a Diesel Oxidation Catalyst used as a part of a NOx Storage and Reduction system is modeled and simulated. The aim is to find a model to understand, explain and predict its behavior making the improvement and optimization of the mentioned system easier and faster. A series of experiments were done covering different temperatures, compositions and flows. The aim was to find a model to cover all the experiments but it was not possible and the data was split in two parts, low temperature or Kinetic Limiting and high temperature or Equilibrium Limiting models. For the high temperature range, the model developed by Sampara et al. 2008 was used and optimized. In the low temperature range a model resulting from the combination of two models developed by Crocoll et al. 2005 and Tanaka et al. 2005 respectively was used.