Study on Dynamic Response Characteristics of Cu-Zeolite SCR Catalyst based on Kinetic Model

Abstract. Traditional SCR control methods can't fit the high efficiency SCR and keep the coherence of production. Model-based SCR control methods is developed to compensate the defect. A simulation model for a Cu-zeolite SCR catalyst has been developed. The model is capable of predicting the conversion of NO X , NH 3 slip and calculate the amount of urea on real time. It also can be used to study the impact of temperature, space velocity on NO X conversion and NH 3 storage. Testing validations were taken based on WHTC test cycle. The results show that the average error between calculated and measured NO X conversion efficiency is about 3.4% during the test cycle. In general, good agreement between model prediction and the experimental data was achieved