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NO2 Formation and Mitigation in an Advanced Diesel Aftertreatment System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 3, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Nitrogen dioxide (NO2) is known to pose a risk to human health and contributes to the formation of ground level ozone. In recognition of its human health implications, the American Conference of Governmental Industrial Hygienists (ACGIH) set a Threshold Limit Value (TLV) of 0.2 ppmv NO2 in 2012. For mobile sources, NO2 is regulated as a component of NOx (NO + NO2). In addition, the European Commission has indicated it is considering separate Euro 6 light-duty diesel and Euro VI heavy-duty diesel NO2 emissions limits likely to mitigate the formation of ground level ozone in urban areas. In this study, we conduct component-level reactor-based experiments to understand the effects that various aftertreatment catalyst technologies including diesel oxidation catalyst (DOC), diesel particulate filter (DPF), selective catalytic reduction (SCR) catalyst and ammonia oxidation (AMOX) catalyst have on the formation and mitigation of NO2 emissions. Finally, emissions from a nonroad Tier 4 Final/Stage IV engine equipped with an advanced aftertreatment system are analyzed to understand the effect of real-world engine operating conditions on NO2 emissions. Experiments were conducted over nonroad steady and both cold and hot transient cycles (NRSC and NRTC, respectively). It is our expectation that the results presented herein can be utilized by engine manufacturers and regulators to better understand the impact that diesel aftertreatment technologies have on NO2 emissions.
CitationOttinger, N., Xi, Y., Schmidt, N., and Liu, Z., "NO2 Formation and Mitigation in an Advanced Diesel Aftertreatment System," SAE Technical Paper 2018-01-0651, 2018, https://doi.org/10.4271/2018-01-0651.
Data Sets - Support Documents
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- U.S. EPA , 40 C.F.R. § 50, “National Primary and Secondary Ambient Air Quality Standards.”
- U.S. EPA , “Technical Bulletin: Nitrogen Oxides (NOx), Why and How they are Controlled,” 465/F-99-006R, 1999, https://www3.epa.gov/ttncatc1/dir1/fnoxdoc.pdf.
- EU , Directive 2008/50/EC, “Ambient Air Quality and Cleaner Air for Europe,” 2008.
- European Commission , “Work Programme on Vehicles and Emissions from NRMM 2017-2018,” 2017.
- Hillard, J.C. andWheeler, R.W., “Nitrogen Dioxide in Engine Exhaust,” SAE Technical Paper 790691 , 1979.
- Finesso, R.,Misul, D., andSpessa, E., “Estimation of the Engine-Out NO2/NOx Ratio in a EURO VI Diesel Engine,” SAE Technical Paper 2013-01-0317 , 2013, doi:10.4271/2013-01-0317.
- Pipho, M.,Kittelson, D., andZarling, D., “NO2 Formation in a Diesel Engine,” SAE Technical Paper 910231 , 1991, doi:10.4271/910231.
- Henry, C.,Currier, N.,Ottinger, N.,Yezerets, A. et al. , “Decoupling the Interactions of Hydrocarbons and Oxides of Nitrogen over Diesel Oxidation Catalysts,” SAE Technical Paper 2011-01-1137 , 2011.
- Katare, S.,Patterson, J., andLaing, P., “Aged DOC is a Net Consumer of NO2: Analyses of Vehicle, Engine-Dynamometer and Reactor Data,” SAE Technical Paper 2007-01-3984 , 2007.
- Lakkireddy, V.,Mohammed, H.,Johnson, J., andBagley, S., “The Effect of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter on the Emissions from a Heavy Duty Diesel Engine,” SAE Technical Paper 2006-01-0875 , 2006.
- Stachulak, J.,Gangal, M.,Allen, C., “The Effect of Diesel Oxidation Catalysts on NO2 Emission from Mining Vehicles,” 20th MEDC Conference, 2014.
- Ottinger, N.A.,Foley, B.,Xi, Y., andLiu, Z.G., “Impact of Hydrocarbons on the Dual (Oxidation and SCR) Functions of Ammonia Oxidation Catalysts,” SAE Int. J. Engines 7(3), 2014, doi:10.4271/2014-01-1536.
- Kamasamudram, K.,Yezerets, A.,Chen, X.,Currier, N. et al. , “New Insights into Reaction Mechanism of Selective Catalytic Ammonia Oxidation Technology for Diesel Aftertreatment Applications,” SAE Int. J. Engines 4(1), 2011, doi:10.4271/2011-01-1314.
- Chen, H.-Y.,Wei, Z.,Kollar, M.,Gao, F. et al. , “NO Oxidation on Zeolite Supported Cu Catalysts: Formation and Reactivity of Surface Nitrates,” Catal. Today 267:17-27, 2016.
- Ellmers, I.,Velez, R.P.,Bentrup, U.,Schwieger, W. et al. , “SCR and NO Oxidation over Fe-ZSM-5 - The Influence of the Fe Content,” Catal. Today 258:337-346, 2015.
- Kim, C.H.,Schmid, M.,Schieg, S.J.,Tan, J., andLi, W., “The Effect of Pt-Pd Ratio on Oxidation Catalysts Under Simulated Diesel Exhaust,” SAE Technical Paper 2011-01-1134 , 2011.
- Liu, Z.,Swor, T.,Schauer, J.,Debilzen, J., andSeverance, C.L., “A Source Dilution Sampling System for Characterization of Engine Emissions under Transient or Steady-State Operation,” Aerosol Sci. Technol. 42:270-280, 2008, doi:10.1080/02786820801992907.
- U.S. EPA, “Draft Regulatory Impact Analysis: Control of Emissions from Nonroad Diesel Engines,” EPA420-R-03-008 (2003). http://www.epa.gov/otaq/cleaner-nonroad/r03008.pdf.