Simulation of Urea-SCR Catalytic Converter for Diesel Engine
A three-dimensional model of a diesel Urea-SCR（Selective Catalytic Reduction）catalytic converter system was set up with aid of CFD software AVL FIRE coupled with available knowledge of SCR chemical reaction kinetics. Basing on the validation of the spray injection model of Urea-water-solution, the numerical simulation was made to get the distribution of pressure, velocity, temperature and species concentration in the converter and NOx conversion in different conditions by considering the injection and evaporation of the urea-water-solution, the thermal decomposition and hydrolysis into ammonia and the surface catalytic reactions in the monolith. The simulated results have some reference meaning for improving NOx conversion efficiency and optimizing the diesel SCR catalytic converter.
Hao Zhang, Yang Fu and Zhong Tang
Q. Wang et al., "Simulation of Urea-SCR Catalytic Converter for Diesel Engine", Advanced Materials Research, Vols. 354-355, pp. 513-517, 2012