This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
NO 2 Formation and Mitigation in an Advanced Diesel Aftertreatment System
Technical Paper
2018-01-0651
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Authors
Citation
Ottinger, 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
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 |
Also In
References
- U.S. EPA
- U.S. EPA 1999 https://www3.epa.gov/ttncatc1/dir1/fnoxdoc.pdf
- EU 2008
- European Commission Work Programme on Vehicles and Emissions from NRMM 2017-2018 2017
- Hillard , J.C. and Wheeler , R.W. Nitrogen Dioxide in Engine Exhaust SAE Technical Paper 790691 1979
- Finesso , R. , Misul , D. , and Spessa , E. Estimation of the Engine-Out NO2/NOx Ratio in a EURO VI Diesel Engine SAE Technical Paper 2013-01-0317 2013 10.4271/2013-01-0317
- Pipho , M. , Kittelson , D. , and Zarling , D. NO 2 Formation in a Diesel Engine SAE Technical Paper 910231 1991 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. , and Laing , P. Aged DOC is a Net Consumer of NO 2 : Analyses of Vehicle, Engine-Dynamometer and Reactor Data SAE Technical Paper 2007-01-3984 2007
- Lakkireddy , V. , Mohammed , H. , Johnson , J. , and Bagley , 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. 2 th 2014
- Ottinger , N.A. , Foley , B. , Xi , Y. , and Liu , Z.G. Impact of Hydrocarbons on the Dual (Oxidation and SCR) Functions of Ammonia Oxidation Catalysts SAE Int. J. Engines 7 3 2014 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 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. , and Li , 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. , and Severance , 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 10.1080/02786820801992907
- U.S. EPA 2003 http://www.epa.gov/otaq/cleaner-nonroad/r03008.pdf