Experimental and Modeling Study of a Diesel Oxidation Catalyst (DOC) under Transient and CPF Active Regeneration Conditions Michigan Technological University

Format:

Conference/Event

Author/Creator:

Song, Song, author.

Contributor:

Johnson, John H.

Naber, Jeffrey

Parker, Gordon

Surenahalli, Harsha

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

In this study, a DOC catalyst was experimentally studied in anengine test cell with a2010 Cummins 6.7L ISB diesel and aproduction aftertreatment system. The test matrix consisted ofsteady state, active regeneration with in-cylinder fuel dosing andtransient conditions. Conversion efficiencies of total hydrocarbon(THC), CO, and NO were quantified under each condition.A previously developed high-fidelity DOC model capable ofpredicting both steady state and transient active regenerationgaseous emissions was calibrated to the experimental data. Themodel consists of a single 1D channel where mass and energy balanceequations were solved for both surface and bulk gas regions. Thesteady-state data were used to identify the activation energies andpre-exponential factors for CO, NO and HC oxidation, while thesteady-state active regeneration data were used to identify theinhibition factors. The transient data were used to simulate thethermal response of the DOC. A calibration procedure was developedand the identified model parameters are presented.The performance of the model was compared to the experimentalresults in terms of the outlet NO2/NOx ratios and CO, HCconversion efficiencies. The results show that the model is able tosimulate the DOC performance under steady-state and transientconditions and during active regeneration conditions. The model isable to predict the outlet temperatures and HC concentrationswithin the measurement uncertainties. An inhibition factor thataccounts for the inhibition of reactions in the presence of highhydrocarbon concentrations was determined so that the outlet HC andNO2 concentrations during active regeneration were simulatedaccurately

Notes:

Vendor supplied data

Publisher Number:

2013-01-1046

Access Restriction:

Restricted for use by site license