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Effects of DOC and CDPF Catalyst Composition on Emission Characteristics of Light-Duty Diesel Engine with DOC + CDPF + SCR System
Technical Paper
2018-01-0337
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
With regulatory standards for diesel engine emissions becoming stricter worldwide, integrated catalytic systems are becoming increasingly necessary. One of the better approaches is to use an after-treatment system consisting of a diesel oxidation catalyst (DOC), a catalyzed diesel particulate filter (CDPF), and a selective catalytic reduction (SCR), but many factors can affect how well this system works. This study investigates the effects of DOC and CDPF catalyst composition on emissions characteristics for DOC + CDPF + SCR systems by collecting reactor and engine data. The reactor results show that the light-off temperatures (T50) of CO and C3H6 increase with the growth of Pt:Pd ratio while the T50 of NO degrades. An engine dynamometer test was conducted on a light-duty diesel engine equipped with DOC + CDPF + SCR. The results show light-off curves of CO and THC that are smoother than the reactor data. The CO and THC oxidation activities increase monotonically as the Pt:Pd ratio decreases in a low-temperature range (≤ 400 °C), whereas NO oxidation exhibited the opposite trend. But the beneficial effect from Pt or Pd degrades with increases in temperature (> 400 °C). Moreover, the differences in the light-off characteristics caused by Pt:Pd ratio changes in DOC, are less affected by the CDPF catalyst and can be maintained after CDPF. High Pt content in CDPF causes a greater reduction in the nuclei-mode particles but has little impact on the accumulation-mode. The particulate number-size distribution shows bimodal or multimodal lognormal distribution after CDPF. The reductions of the particulate number and the particulate mass are more than 90% and show a downward trend with the increase of space velocity. Compared to DOC, improving Pt level in CDPF is more conducive to SCR reduction. Besides, no significant influence of DOC or CDPF catalyst composition on back pressure and engine economic performance has been found.
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Zhang, J., Lou, D., Sun, Y., Tan, P. et al., "Effects of DOC and CDPF Catalyst Composition on Emission Characteristics of Light-Duty Diesel Engine with DOC + CDPF + SCR System," SAE Technical Paper 2018-01-0337, 2018, https://doi.org/10.4271/2018-01-0337.Data Sets - Support Documents
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References
- Huang , Z.H. , Hao , C.X. , Wang , J.F. , and Xie , Q. Analysis of Vehicle Contaminants Emission in China Environmental Protection 13 42 47 2017 10.14026/j.cnki.0253-9705.2017.13.009
- Myung , C.L. and Park , S. Exhaust nanoparticle Emissions from Internal Combustion Engines: A Review International Journal of Automotive Technology 13 1 9 22 2012 10.1007/s12239-012-0002-y
- Reşitoğlu , İ.A. , Altinişik , K. , and Keskin , A. The Pollutant Emissions from Diesel-Engine Vehicles and Exhaust Aftertreatment Systems Clean Technologies & Environmental Policy 17 1 15 27 2015 10.1007/s10098-014-0793-9
- Jia , Q.E. , Pham , M. , Zhao , D. , Deng , Y. et al. Effect of Different Technologies on Combustion and Emissions of the Diesel Engine Fueled with Biodiesel: A Review Renewable & Sustainable Energy Reviews 80 620 647 2017 10.1016/j.rser.2017.05.250
- Mohankumar , S. and Senthilkumar , P. Particulate Matter Formation and its Control Methodologies for Diesel Engine: A Comprehensive Review Renewable & Sustainable Energy Reviews 80 1227 1238 2017 10.1016/j.rser.2017.05.133
- Atadashi , I.M. , Aroua , M.K. , and Aziz , A.A. High Quality Biodiesel and its Diesel Engine Application: A Review Renewable & Sustainable Energy Reviews 14 7 1999 2008 2010 10.1016/j.rser.2010.03.020
- Haupt , D. , Nord , K. , Tingvall , B. , Ahlvik , P. et al. Investigating the Potential to Obtain Low Emissions from a Diesel Engine Running on Ethanol and Equipped with EGR, Catalyst and DPF SAE Technical Paper 2004-01-1884 2004 10.4271/2004-01-1884
- Guan , B. , Zhan , R. , Lin , H. , and Huang , Z. Review of the State of the Art of Exhaust Particulate Filter Technology in Internal Combustion Engines Journal of Environmental Management 154 225 258 2015 10.1016/j.jenvman.2015.02.027
- Guan , B. , Zhan , R. , Lin , H. , and Huang , Z. Review of State of the Art Technologies of Selective Catalytic Reduction of NO x , from Diesel Engine Exhaust Applied Thermal Engineering 66 1-2 395 414 2014 10.1016/j.applthermaleng.2014.02.021
- Johnson , T.V. Review of Diesel Emissions and Control International Journal of Engine Research 10 5 275 285 2010 10.1243/14680874JER04009
- Chen , P. and Wang , J. Control-Oriented Modeling of Thermal Behaviors for a Diesel Oxidation Catalyst American Control Conference 4987 4992 2012 10.1109/ACC.2012.6314860
- Twigg , M.V. Catalytic Control of Emissions from Cars Catalysis Today 163 1 33 41 2011 10.1016/j.cattod.2010.12.044
- Prasad , R. and Bella , V.R. A Review on Diesel Soot Emission, its Effect and Control Bulletin of Chemical Reaction Engineering & Catalysis 5 2 2011 10.9767/bcrec.5.2.794.69-86
- Zhang , Y.H. , Lou , D.M. , Tan , P.Q. , Hu , Z.Y. et al. Effects of DOC+CDPF on Emission Characteristics of Heavy-duty Diesel Vehicle Environmental Science 38 5 1828 1834 2017 10.13227/j.hjkx.201610188
- Feng , Q. , Lou , D.M. , Ji , W.B. , Tan , P.Q. et al. Effects of DOC and DOC+CDPF on Gaseous Emissions from a Heavy-Duty Diesel Engine Chinese Internal Combustion Engine Engineering 35 4 1 6 2014 10.3969/j.issn.0253-2409.2014.12.015
- Lou , D.M. , He , N. , Tan , P.Q. , Hu , Z.Y. et al. Effect of DOC/CCRT Aging on Gaseous Emission Characteristics of an In-Used Diesel Engine Bus Environmental Science 37 6 2059 2064 2016 10.13227/j.hjkx.2016.06.008
- Kang , W. and Choi , B. Effect of Copper Precursor on Simultaneous Removal of PM and NO x , of a 2-way SCR/CDPF Chemical Engineering Science 141 175 183 2016 10.1016/j.ces.2015.11.007
- Koebel , M. , Elsener , M. , and Kleemann , M. Urea-SCR: A Promising Technique to Reduce NO x Emissions from Automotive Diesel Engines Catalysis Today 59 3 335 345 2000 10.1016/S0920-5861(00)00299-6
- Kim , C. , Schmid , M. , Schmieg , S. , Tan , J. et al. The Effect of Pt-Pd Ratio on Oxidation Catalysts under Simulated Diesel Exhaust SAE Technical Paper 2011-01-1134 2011 10.4271/2011-01-1134
- Haneda , M. , Suzuki , K. , Sasaki , M. , Hamada , H. et al. Catalytic Performance of Bimetallic PtPd/Al 2 O 3 for Diesel Hydrocarbon Oxidation and its Implementation by Acidic Additives Appl. Catal. A: Gen. 475 109 115 2014 10.1016/j.apcata.2014.01.023
- Fang , Y.D. , Lou , D.M. , Tan , P.Q. , Hu , Z.Y. et al. Effects of CDPF Catalyst Composition on Particulate Emission Characteristic of Diesel Engine Chinese Internal Combustion Engine Engineering 37 5 56 60 2016 10.13949/j.cnki.nrjgc.2016.05.010
- Feng , Q. 2016
- Nazarpoor , Z. , Golden , S. , and Liu , R. Development of Advanced Ultra-Low PGM DOC for BS VI DOC+CDPF+SCR System SAE Int. J. Mater. Manf. 10 1 72 77 2017 10.4271/2017-26-0142
- Glaspell , G. , Hassan , H.M. , Elzatahry , A. , Fuoco , L. et al. Nanocatalysis on Tailored Shape Supports: Au and Pd Nanoparticles Supported on MgO Nanocubes and ZnO Nanobelts Journal of Physical Chemistry B 110 43 21387 21393 2006 10.1021/jp0651034
- Chatterjee , D. , Burkhardt , T. , Rappe , T. , Güthenke , A. et al. Numerical Simulation of DOC+DPF+SCR Systems: DOC Influence on SCR Performance SAE International Journal of Fuels and Lubricants 1 1 440 451 2009 10.4271/2008-01-0867
- Patterson , M.J. , Angove , D.E. , and Cant , N.W. The Effect of Carbon Monoxide on the Oxidation of Four C 6 to C 8 Hydrocarbons over Platinum, Palladium and Rhodium Applied Catalysis B Environmental 26 1 47 57 2000 10.1016/S0926-3373(00)00110-7
- Gélin , P. , Urfels , L. , Primet , M. , and Tena , E. Complete Oxidation of Methane at Low Temperature Over Pt and Pd Catalysts for the Abatement of Lean-Burn Natural Gas Fuelled Vehicles Emissions: Influence of Water and Sulphur Containing Compounds Catalysis Today 83 1-4 45 57 2003 10.1016/S0920-5861(03)00215-3
- Persson , K. , Ersson , A. , Jansson , K. , Fierro , J.L.G. et al. Influence of Molar Ratio on Pd-Pt Catalysts for Methane Combustion Journal of Catalysis 243 1 14 24 2006 10.1016/j.jcat.2006.06.019
- Lapisardi , G. , Urfels , L. , Gélin , P. , Primet , M. et al. Superior Catalytic Behaviour of Pt-Doped Pd Catalysts in the Complete Oxidation of Methane at Low Temperature Catalysis Today 117 4 564 568 2006 10.1016/j.cattod.2006.06.004
- Etheridge , J. , Watling , T. , Izzard , A. , and Paterson , M. The Effect of Pt:Pd Ratio on Light-Duty Diesel Oxidation Catalyst Performance: An Experimental and Modelling Study SAE International Journal of Engines 8 3 1283 1299 2015 10.4271/2015-01-1053
- Glover , L. , Douglas , R. , McCullough , G. , Keenan , M. et al. Performance Characterisation of a Range of Diesel Oxidation Catalysts: Effect of Pt:Pd Ratio on Light Off Behaviour and Nitrogen Species Formation SAE Technical Paper 2011-24-0193 2011 10.4271/2011-24-0193
- Salasc , S. , Skoglundh , M. , and Fridell , E. A Comparison Between Pt and Pd in NO x Storage Catalyst Appl. Catal. B: Environ. 36 2 145 160 2002 10.1016/S0926-3373(01)00300-9
- Olsson , L. and Fridell , E. The Influence of Pt Oxide Formation and Pt Dispersion on the Reactions NO 2 ⇔NO+1/2 O 2 , over Pt/Al 2 O 3 , and Pt/BaO/Al 2 O 3 Journal of Catalysis 210 2 340 353 2002 10.1006/jcat.2002.3698
- Pfeifer , M. , Kögel , M. , Spurk , P. , and Jeske , G. New Platinum/Palladium Based Catalyzed Filter Technologies for Future Passenger Car Applications SAE Technical Paper 2007-01-0234 2007 10.4271/2007-01-0234
- Zhao , H. , Wang , W. L. , Yang , J. J. , and Wang , J. Q. After-Treatment Technology for Vehicle Diesel Beijing China Science and Technology Press 2010 147 148 9787504657725