Kinetic study on soot oxidation by simulated diesel gas emissions

HeeJe  Seong, Argonne National Laboratory

We propose an analytical methodology for evaluating kinetic parameters in soot oxidation. With this methodology, we conducted non-isothermal soot oxidation experiments in a thermogravimetric analyzer (TGA) to characterize the effects of reactant gases (NO, NO2, CO2, and O2) in the various compositions of gas mixtures simulating diesel exhaust emissions. Our study showed that there are notable effects of NO2 and O2 concentrations on activation energy with respect to operating temperature. In conclusion, it is suggested that when NO2 concentration is determined for regeneration in DPF systems, oxidation temperature should also be taken into consideration.

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