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Experimental and Modeling Results Comparing Two Diesel Oxidation Catalyst - Catalyzed Particulate Filter Systems
Technical Paper
2008-01-0484
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Steady-state particulate loading experiments were conducted on an advanced production catalyzed particulate filter (CPF), both with and without a diesel oxidation catalyst (DOC). A heavy-duty diesel engine was used for this study with the experiments conducted at 20, 40, 60 and 75 % of full load (1120 Nm) at rated speed (2100 rpm). The data obtained from these experiments were used and are necessary for calibrating the MTU 1-D 2-Layer CPF model. These experimental and modeling results were compared to previous research conducted at MTU that used the same engine but an earlier development version of the combination of DOC and CPF. The motivation for the comparison of the two systems was to determine whether the reformulated production catalysts performed as good or better than the early development catalysts.
The results were compared to understand the filtration and oxidation differences between the two DOC+CPF and the CPF-only aftertreatment systems. Comparisons of the pressure drop, filtration and passive oxidation performances are presented. Differences in the two aftertreatment system performance were minimal. For both systems it was observed that NO2 PM oxidation is the dominate oxidation mechanism for exhaust temperatures below 400°C. DOC oxidation of NO to NO2 for both DOC's was similar with the highest conversion efficiencies observed at the two lower loads corresponding to the temperature range of 280 - 340°C. This is comparable to ranges observed in other studies. Conversion of NO to NO2 across CPF in CPF-only configuration was 10 to 28% higher in the earlier development version compared to the production catalyst resulting in higher NO2 outlet concentrations.
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Dabhoiwala, R., Johnson, J., Naber, J., and Bagley, S., "Experimental and Modeling Results Comparing Two Diesel Oxidation Catalyst - Catalyzed Particulate Filter Systems," SAE Technical Paper 2008-01-0484, 2008, https://doi.org/10.4271/2008-01-0484.Also In
References
- Johnson Matthey Catalysts Website
- Cooper B. Thoss J. “Role of NO in Diesel Particulate Emission Control” SAE 890404 1989
- Allansson R. Blakeman P.G. Cooper B.J. Hess H. Silcock P.J. Walker A.P. “Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System” SAE 2002-01-0428 2002
- Premchand K. C. Johnson J. H. Yang Song-Lin Michigan Technological University Triana A. P. Baumgard K. J. John Deere Power Systems “A Study of the Filtration and Oxidation Characteristics of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter” SAE 2007-01-1123 2007
- Singh P. Thalagavara A. M. Naber J. D. Johnson J. H. Bagley S. T. “An Experimental Study of Active Regeneration of an Advanced Catalyzed Particulate Filter by Diesel Fuel Injection Upstream of an Oxidation Catalyst” SAE 2006-01-0879 2006
- Singh Paramjot “An Experimental Study of Active Regeneration of an Advanced Catalyzed Particulate Filter by Diesel Fuel Injection Upstream of an Oxidation Catalyst” Michigan Technological University 2006
- Mohammed H. Lakkireddy V.R. Johnson J.H. Bagley S.T. “An Experimental and Modeling Study of a Diesel Oxidation Catalyst and a Catalyzed Diesel Particulate Filter Using a 1-D 2-Layer Model” SAE 2006-01-0466 2006
- Mohammed Hasan “The Filtration and Oxidation Characteristics of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter: Development of a 1-D 2-Layer Model” Michigan Technological University 2005
- Premchand Kiran “An Experimental and Modeling Study of the Filtration and Oxidation Characteristics of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter” Michigan Technological University 2006
- Mohammed H. Triana A.P. Yang S.L. Johnson J.H. “An Advanced 1D 2-Layer Catalyzed Diesel Particulate Filter Model to Simulate: Filtration by the Wall and Particulate Cake, Oxidation in the Wall and Particulate Cake by NO 2 and O 2 , and Regeneration by Head Addition” SAE 2006-01-0467 2006
- Dabhoiwala Rayomand “An Experimental and Modeling Study of Two Diesel Oxidation Catalyst - Catalyzed Particulate Filter Systems and the Effects of a Cracked Filter on its Performance” Michigan Technological University 2007
- Lakkireddy V.R. Mohammed H. Johnson J.H. “The Effect of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter on Particle Size Distribution from a Heavy-duty Diesel Engine” SAE 2006-01-0877 2006
- Lakkireddy Venkata R. “The Effect of an Advanced Oxidation Catalytic Converter and a Catalyzed Particulate Filter on the Emissions from a Heavy-duty Diesel Engine” Michigan Technological University 2004
- Johnson J.E. Kittleson D. “Physical Factors Affecting Hydrocarbon Oxidation in a Diesel Oxidation Catalyst.” SAE 941771 1994
- Dabhoiwala R. H. Johnson J. H. Naber J. D. Bagley S.T. “A Methodology to Estimate the Mass of Particulate Matter Retained in a Catalyzed Particulate Filter as Applied to: Active Regeneration and Onboard Diagnostics to Detect Filter Failure” SAE 2008-01-0764 2008