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Modeling an Ammonia SCR DeNOx Catalyst: Model Development and Validation
Technical Paper
2004-01-0155
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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.
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Authors
- Andrew P.E. York - Johnson Matthey Technology Centre
- Timothy C. Watling - Johnson Matthey Technology Centre
- Julian P. Cox - Johnson Matthey Technology Centre
- Isabel Z. Jones - Johnson Matthey Technology Centre
- Andrew P. Walker - Johnson Matthey, Environmental Catalysts and Technologies
- Philip G. Blakeman - Johnson Matthey, Environmental Catalysts and Technologies
- Thomas Ilkenhans - Johnson Matthey, Environmental Catalysts and Technologies
- Ronny Allansson - Johnson Matthey, Environmental Catalysts and Technologies
- Mats Lavenius - Johnson Matthey, Environmental Catalysts and Technologies
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.Also In
Number:SP-1835CD; Published:2004-03-08
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