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Development of Ultra-Low Synergized PGM as Diesel Oxidation Catalyst for Heavy-Duty Applications
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 17, 2016 by SAE International in United States
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Stricter regulatory standards are continuously adopted worldwide to control heavy duty emissions, and at the same time, fuel economy requirements have significantly lowered exhaust temperatures. The net result is a significant increase in Precious Group Metal (PGM) usage with current Diesel Oxidation Catalyst (DOC) technology. Therefore, the design and development of synergized precious metal (SPGM) in which ultra-low PGM is synergized with mixed metal oxide (MMO) to achieve highly beneficial emission performance improvement, is necessary. The presence of MMO in SPGM is responsible for NO oxidation to NO2 which is critical for the passive regeneration of the downstream filter and SCR function.
This paper presents an initial study outlining the development of MMOs for application in modern DOCs and addresses some specific challenges underlying this application. Lab and flow reactor data in this study demonstrated SPGM DOCs thermal resistance and sulfur poisoning resistance. In addition, SPGM DOC with reduced PGM levels indicated the increase of NO2 production at T>250 °C compared to OEM benchmarks. This paper outlines the results of engine dyno, transient dyno and on-road testing of SPGM DOCs versus OEM DOCs. The engine testing indicated high level of NO2 production at significantly reduced PGM levels. On-road testing showed no change or deterioration of the system performance after the switch to SPGM for a heavy duty DOC and filter system. Field data logging during on-road testing showed identical exotherms for the same active regeneration calibration, which results in equivalent DPF regeneration. Disclosed SPGM for on-road heavy-duty applications is consistent with sufficient CO and HC conversion and superior warmed up NO2 make. Specific challenges remain in the development of the SPGM DOC which is under investigation based on formulation and mechanism of mixed metal oxides.
|Journal Article||Development of Advanced Ultra-Low PGM DOC for BS VI DOC+CDPF+SCR System|
|Magazine Issue||Automotive Engineering: June 2, 2015|
|Technical Paper||The Development of a Production Qualified Catalytic Converter|
CitationNazarpoor, Z., Golden, S., Launois, M., Kitazumi, S. et al., "Development of Ultra-Low Synergized PGM as Diesel Oxidation Catalyst for Heavy-Duty Applications," SAE Technical Paper 2016-01-2321, 2016, https://doi.org/10.4271/2016-01-2321.
- Haass , F. , Fuess , H. Structural characterization of automotive catalysts Adv. Eng. Mater. 7 10 2005 899
- Twigg , M. Roles of catalytic oxidation in control of vehicle exhaust emissions Catal. Today 117 4 2006 407
- Heck R.M. , Farrauto , R.J. Automobile exhaust catalysts Appl. Catal. A: Gen. 221 2001 443
- Zhang , R. Villanueva , A. , Alamdari , H. , Kaliaguine , S. Cu-and Pd substituted nanoscale Fe-based perovskite for selective catalytic reduction of NO by propane J. Catal 237 2 2006 368
- Lebukhova , N.V. , Rudnev , V.S. , Kirichenko , E. A. , Chigrin , P.G. , Lukivanchuk , I.V. , Karpovich , N.F. , Pugachevsky , M.A. , Kurjavyj , V.G. The structural catalyst CuMoO 4 /TiO 2 /TiO 2 + SiO 2 /Ti for diesel soot combustion Surf. Coat. Tech. 261 2015 344
- Soloview , S. O. , Kapran , A. Y , Kurylets , Y. P. Oxidation of diesel soot on binary oxide CuCr(Co)-based monoliths J. Envir. Sci. 28 2015 171
- Zhang , H. , Wang , J. , Cao , Y. , Wang , Y. , Gong , M. , Chen , Y. Effect of Y on improving the thermal stability of MnOx-CeO2 catalysts for diesel soot oxidation Chine. J. Catal. 36 8 2015 1333
- Voorhoeve , R.J.H. , Johnson , D.W. , Remeika , J.P. , Gallagher , P.K. Perovskite oxides: materials science in catalysis Science 195 1977 827
- Wen , Y. , Zhang , C. , He , H. , Yu , Y. , Teraoka , Y. Catalytic oxidation of nitrogen monoxide over La 1-x Ce x CoO 3 perovskites Catal. Today 126 2007 400
- Kim , C. H. , Qi , G. , Dahlberg , Li, W. Strontium-doped perovskite rival platinum catalysts for treating NOx in simulated diesel exhaust Science 327 2010 1624
- Li , J. , Kumar , A. , Chen , X. , Currier , N. et al. Impact of Different Forms of Sulfur Poisoning on Diesel Oxidation Catalyst Performance SAE Technical Paper 2013-01-0514 2013 10.4271/2013-01-0514