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Experimental and Modeling Study of a Diesel Oxidation Catalyst (DOC) under Transient and CPF Active Regeneration Conditions
Technical Paper
2013-01-1046
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this study, a DOC catalyst was experimentally studied in an
engine test cell with a2010 Cummins 6.7L ISB diesel and a
production aftertreatment system. The test matrix consisted of
steady state, active regeneration with in-cylinder fuel dosing and
transient conditions. Conversion efficiencies of total hydrocarbon
(THC), CO, and NO were quantified under each condition.
A previously developed high-fidelity DOC model capable of
predicting both steady state and transient active regeneration
gaseous emissions was calibrated to the experimental data. The
model consists of a single 1D channel where mass and energy balance
equations were solved for both surface and bulk gas regions. The
steady-state data were used to identify the activation energies and
pre-exponential factors for CO, NO and HC oxidation, while the
steady-state active regeneration data were used to identify the
inhibition factors. The transient data were used to simulate the
thermal response of the DOC. A calibration procedure was developed
and the identified model parameters are presented.
The performance of the model was compared to the experimental
results in terms of the outlet NO2/NOx ratios and CO, HC
conversion efficiencies. The results show that the model is able to
simulate the DOC performance under steady-state and transient
conditions and during active regeneration conditions. The model is
able to predict the outlet temperatures and HC concentrations
within the measurement uncertainties. An inhibition factor that
accounts for the inhibition of reactions in the presence of high
hydrocarbon concentrations was determined so that the outlet HC and
NO2 concentrations during active regeneration were simulated
accurately.
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Citation
Song, X., Surenahalli, H., Naber, J., Parker, G. et al., "Experimental and Modeling Study of a Diesel Oxidation Catalyst (DOC) under Transient and CPF Active Regeneration Conditions," SAE Technical Paper 2013-01-1046, 2013, https://doi.org/10.4271/2013-01-1046.Also In
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