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SCR (Selective Catalytic Reduction) technology is the most effective after-treatment technology of DeNOx on vehicle diesel engines. In this paper, a modeling of vehicle diesel Urea-SCR after-treatment system was set up with the method of CFD coupled with chemical reaction dynamic, to make a full-scale simulation and comparison of two Urea-SCR catalyst systems, analyzing the influences of different exhaust temperatures on the emission performance of SCR system, so as to better improve the design of SCR system.

Research on the Influence of Exhaust Temperatures on the Emission Performance of Urea-SCR After-treatment System