Numerical simulation of the deterioration performance of automotive three-way catalytic converter

Based on the deterioration mechanism of the three-way catalystic converter, the main deterioration performance parameters, such as the mean diameter of Pt particles and the frequency factors of reaction, were analyzed in detail. Then the reaction model, including the deterioration process of three-way catalytic converter, was created by combining deterioration performance parameters with the chemical reactions mechanism. Numerical simulation was in progress then. The results have showed that, after a deterioration of 80000 km, the deactivation factor of reaction was minimal in the front of the monolish, and the deactivation factor of oxygen storage and release effects was minimal in the middle of the monolish, while the mean diameter of Pt particles was maximal in the middle and decreased in the ends. The results were roughly coincident with the test results, thus the validity of the reaction model of three-way catalytic converter based on deterioration performance was verified.