The transient conversion rate of NO in cold start is successfully simulated and predicted by the model in CFD program and agreed well measured value in the literature.
The modeling program predicted NO conversion of 99% after light-off at steady state condition. However, the CO
transient conversion rate by the model is not well predicted.
Nevertheless, the modelling program predicted steady state final CO conversion of 84% which is similar
to measured value in literature.
This might be caused by omission of HC conversion reactions in this model which eventually failed to show the effect of NO and HC competing with CO for O2 in their reactions.