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Development of a DOC+SCR Exhaust Catalyst System for Light Duty Truck (N2 Category) Meeting NS-V Regulation
Technical Paper
2017-01-2368
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
The 4JB1 diesel engine originated from Isuzu has large share in the China light duty truck market. However, the tightened NOx emission target enforced by NS-V legislation compared with NS-IV regulatory standard is very challenging for this engine platform which originally adopted the DOC+POC catalyst layout. Furthermore, combustion characterization of this type engine leads to high soluble organic fraction (SOF) content in engine out particulates, which requires the catalysts in the exhaust after-treatment system (ATS) to deliver high SOF conversion efficiency in order to meet the regulation limit for particulate matters (PM). In this paper, an innovative exhaust catalyst layout with DOC+V-SCR is introduced. The front DOC is specially formulated with optimized PGM (Platinum Group Metal) loading which ensures effective SOF oxidation while keeping sulfuric acid and sulfate generation minimal. The dual DOC bricks in tandem are sophisticatedly engineered to maximize gas-solid surface interaction with the aim of further enhancing particulate removal efficiency. The downstream Vanadium based SCR is designed with improved low temperature deNOx performance as well as relatively high thermal stability. The robustness of the proposed catalyst system has been demonstrated on 4JB1 type of engines, over 50% reduction in total PM (TPM) and ca. 80% NOx conversion could be achieved. Catalyst deterioration has been proved to be minor over 750 hours’ and 100,000 kilometers’ durability tests. This DOC+V-SCR catalyst layout represents a cost-effective solution for NS-V applications fit for China market.
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Song, W., Tang, W., and Chen, B., "Development of a DOC+SCR Exhaust Catalyst System for Light Duty Truck (N2 Category) Meeting NS-V Regulation," SAE Technical Paper 2017-01-2368, 2017, https://doi.org/10.4271/2017-01-2368.Data Sets - Support Documents
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References
- Zhang , S. , Wu , Y. , Zhao , B. , Wu , X. et al. City-specific Vehicle Emission Control Strategies to Achieve Stringent Emission Reduction Targets in China’s Yangtze River Delta Region Journal of Environmental Sciences 51 2017 75 87
- Zhan , R. , Li , M. , and Shui , L. Updating China Heavy-Duty On-Road Diesel Emission Regulations SAE Technical Paper 2012-01-0367 2012 10.4271/2012-01-0367
- Johnson , T. Diesel Emission Control in Review SAE International Journal of Fuels and Lubricants 1 2008 68 81
- Farrauto , R. , Voss , K. Monolithic Diesel Oxidation Catalysts Applied Catalysis B: Environmental 10 1996 29 51
- Winkler , A. , Ferri , D. , Aguirre , M. The Influence of Chemical and Thermal Aging on the Catalytic Activity of a Monolithic Diesel Oxidation Catalyst Applied Catalysis B: Environmental 93-1 2007 177 184
- Johnson , T. Review of Vehicular Emissions Trends SAE Int. J. Engines 8 3 1152 1167 2015 10.4271/2015-01-0993
- Hallstrom , K. and Shah , S. Emission Control Options and Optimization for BSVI Heavy Duty Diesel Applications SAE Technical Paper 2017-26-0120 2017 10.4271/2017-26-0120
- Krishnamurthy , M. , Carder , D.K. , Thompson , G. , Gautam , M. Cost of Lower NOx Emissions: Increased CO2 Emissions from Heavy-Duty Diesel Engines Atmospheric Environment 41 2007 666 675
- Tang , W. , Chen , B. , Hallstrom , K. , and Wille , A. Aftertreatment Pathways to Meet China HDD Emissions Regulations SAE Int. J. Engines 9 2 739 749 2016 10.4271/2016-01-0687
- Chapman , D. Behavior of Titania-supported Vanadia and Tungsta SCR Catalyst at High Temperatures in Reactant Streams: Tungsten and Vanadium Oxide and Hydroxide Vapor Pressure Reduction by Surficial Stabilization Applied Catalysis A: General 392 2011 143 150