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Modelling of Soot Oxidation by NO 2 in a Diesel Particulate Filter
- Jan M. Becker - Johnson Matthey Emission Control Technologies ,
- Claus F. Goersmann - Johnson Matthey Emission Control Technologies ,
- Andrew D. Newman - Johnson Matthey Emission Control Technologies ,
- Timothy C. Watling - Johnson Matthey Technology Centre ,
- Athanasios Tsolakis - University of Birmingham ,
- Mehrdad Ahmadinejad - Johnson Matthey Technology Centre/University of Birmingham
ISSN: 1946-3952, e-ISSN: 1946-3960
Published August 30, 2011 by SAE International in United States
Citation: Ahmadinejad, M., Tsolakis, A., Becker, J., Goersmann, C. et al., "Modelling of Soot Oxidation by NO2 in a Diesel Particulate Filter," SAE Int. J. Fuels Lubr. 5(1):359-369, 2012, https://doi.org/10.4271/2011-01-2083.
Two approaches were adopted to study soot oxidation by NO₂; firstly microreactor tests were performed on soot produced by a soot generator over a range of NO₂ concentrations and temperatures. This enabled measurement to be made under well-controlled conditions. Secondly, soot oxidation measurements were made on an engine bench to obtain data under more realistic, if less controlled, conditions. In the microreactor work NO₂ consumption by soot oxidation and the selectivity of the soot oxidation to CO and CO₂ were measured. The latter was found to vary only slightly with temperature and to be independent of NO₂ concentration. By modeling this data using a 1-dimensional model, rate equations for the soot-NO₂ reaction were determined. These were then tested against the engine data. The soot used in this study was characterized by thermogravimetric analysis, N₂ physisorption and transmission electron microscopy.
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