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Issue
Korean Journal of Chemical Engineering,
Vol.30, No.12, 2170-2177, 2013
Selective catalytic reduction converter design: The effect of ammonia nonuniformity at inlet
Paramadayalan T, Pant A
A three-dimensional CFD model of SCR converter with detailed chemistry is developed. The model is used to study the effects of radial variation in inlet ammonia profile on SCR emission performance at different temperatures. The model shows that radial variation in inlet ammonia concentration affects the SCR performance in the operating range of 200-400 ℃. In automotive SCR systems, ammonia is non-uniformly distributed due to evaporation/reaction of injected urea, and using a 1D model or a 3D model with flat ammonia profile at inlet for these conditions can result in erroneous emission prediction. The 3D SCR model is also used to study the effect of converter design parameters like inlet cone angle and monolith cell density on the SCR performance for a non-uniform ammonia concentration profile at the inlet. The performance of SCR is evaluated using DeNOx efficiency and ammonia slip.
Keywords: Catalytic Converter; SCR Converter; CFD; Numerical Modeling; Monolith Reactor; Chemical Kinetics
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[Cited By]
  1. Ko JH, Park RS, Jeon JK, Kim DH, Jung SC, Kim SC, Park YK, Journal of Industrial and Engineering Chemistry, 32, 109, 2015
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