Modeling an Ammonia SCR DeNOx Catalyst: Model Development and Validation 2004-01-0155
A 1-D numerical model describing the ammonia selective catalytic reduction (SCR) de-NOx process has been developed based on data measured on a laboratory microreactor for a vanadia-titania washcoated catalyst system. Kinetics for various NH3-NOx reactions were investigated, as well as those for ammonia, CO and hydrocarbon oxidation. The model has been successfully validated against engine bench measurements, over light-off and ESC tests, under a wide range of conditions, e.g. flow rate, temperature, NO2/NO ratio, and ammonia injection rate. A very good agreement between the experimental data and the model has been achieved. The model has now been used to predict the effect of NO2/NO ratio on NOx conversion, and the effect of different ammonia injection rates on the efficiency of the SCR process.
Citation: York, A., Watling, T., Cox, J., Jones, I. et al., "Modeling an Ammonia SCR DeNOx Catalyst: Model Development and Validation," SAE Technical Paper 2004-01-0155, 2004, https://doi.org/10.4271/2004-01-0155. Download Citation
Author(s):
Andrew P.E. York, Timothy C. Watling, Julian P. Cox, Isabel Z. Jones, Andrew P. Walker, Philip G. Blakeman, Thomas Ilkenhans, Ronny Allansson, Mats Lavenius
Affiliated:
Johnson Matthey Technology Centre, Johnson Matthey, Environmental Catalysts and Technologies
Pages: 10
Event:
SAE 2004 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Exhaust Emission Control Modelling-SP-1861
Related Topics:
Selective catalytic reduction
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