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Urea-SCR Catalyst System Selection for Fuel and PM Optimized Engines and a Demonstration of a Novel Urea Injection System
Technical Paper
2002-01-0289
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper discusses the choice of catalyst types to reduce the NOx emissions down to the Euro V level. A novel Urea injection system is also presented, which is based on a mass produced digital dosing pump that is combined with an electronic control unit specially developed for controlling the Urea-SCR process onboard vehicles. It is shown that it is possible to have a NOx conversion above 80% with ammonia slip below 10 ppm using 30 liters of 130 cpsi catalysts for a 12 diesel engine. By increasing the cell density to 300 cpsi it is possible to reduce the catalyst volume by 2/3 down to 20 liters for the same engine.
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Citation
Gekas, I., Gabrielsson, P., Johansen, K., Nyengaard, L. et al., "Urea-SCR Catalyst System Selection for Fuel and PM Optimized Engines and a Demonstration of a Novel Urea Injection System," SAE Technical Paper 2002-01-0289, 2002, https://doi.org/10.4271/2002-01-0289.Also In
References
- Havenith et al. “Entveichlung eines Verbrauchs-Optimmierten Euro 5 Nfz-Dieselmotors mit Harnstof-SCR-Abgasnach-behandlung.” VDA Technischer Kongress 28 29 Sept. 2000 Frankfurt
- Walker et al “Development of an Ammonia/SCR NOx Reduction System for a Heavy Duty Natural Gas Engine” SAE paper 921673
- Gabrielsson et al Combined Silencers and Urea-SCR Systems for the Heavy-duty Diesel Vehicles for OEM and Retrofit Markets SAE paper 2001-01-0517
- Havenith et al “Transient Performance of a Urea deNOx Catalyst for Low Emissions Heavy-Duty Diesel engines” SAE paper 970185
- Fritz et al “On-Road Demonstrations of NOx Emissions Control for Diesel Trucks with SINOX Urea SCR System” SAE paper 1999-01-0111
- Gabrielsson et al “Urea-SCR NOx Removal Efficiency For a Diesel Engine in the Suggested European ETC Test Cycle” 32 nd ISATA Conference 14 18 June 1999 Vienna- Austria