Effect of Physical Parameters on DeNOx Conversion in Selective Catalytic Converter Used in Diesel Vehicles

Abstract:

The Urea SCR system is a promising approach to reduce NOx in order to meet stringent limits on Euro 1V and Euro V standards. Apart from thermodynamic properties (temperature, pressure,heat and mass transfer), the cell geometry of SCR also got significant role in reduction of NOx. The current study focuses on the calculation of NOx conversion by varying the Open Frontal area of monolith, volume of monolith, cell density thereby to choose best cell geometry which will result in maximum DeNOx efficiency. It has been found that as the cell density increases the NOx conversion efficiency also increases. In the current analysis, a cell density varying from 200 CPSI to 400 CPSI is considered. One dimensional steady state and transient kinetic analysis are carried out using AVL BOOST software. The monolith volume is varied from 0.002m³ to 0.008m³ and the effects on DeNOx efficiency are discussed. The Open frontal area of SCR catalyst also been varied, and the effects on NOx conversion is studied. It has been found that as the cell density, monolith volume increases, the NOx conversion efficiency also increases, where as it decreases with increase in Open frontal area. The results are validated through experimental results obtained from the literature.

• Periodical: Applied Mechanics and Materials (Volume 376)
• Pages: 13-16
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.376.13
• Online since: August 2013
• Authors: A.P. Manoj Kumar, P. Mohanan
• Keywords: Cell Density, Monolith Volume, NH₃, NO_x, SCR

References

[1] William R Miller, Bernd Ballmert, Brian Scarnegie, Recent DPF/SCR results targeting US2007 and Euro 4/5 Emissions, SAE, 2003-01-0774.

DOI: 10.4271/2003-01-0774

[2] Gieshoff J, Sindlinger, Spurk, Van Den Tillaart, Improved SCR systems for Heavy Duty Applications, SAE, 2000-01-0189.

DOI: 10.4271/2000-01-0189

[3] Sung mu Choi, Young kee Yoon, Development of Urea SCR system for Light Duty Diesel Passenger Car, SAE, 2001-01-0519.

DOI: 10.4271/2001-01-0519

[4] AVL List GmBH. BOOST Aftertreatment Manual. AVL List GmBH, Graz, edition . V2011. 2.

DOI: 10.46720/eb2022-ebs-010

[5] Daniel Chatterjee, Thomas Burkhardt, Enrico Tronconi, Isabella Nova, Numerical Simulation of Ammonia SCR-Converters: Model Development and Application, SAE, 2005-01-0965.

DOI: 10.4271/2005-01-0965