You are using an outdated browser. Please upgrade your browser to improve your experience.
Javascript is disabled in your web browser. For full functionality of this site it is necessary to enable JavaScript.
This website is using cookies.
We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.
CPOTE2020 logo
6th International Conference on
Contemporary Problems of Thermal Engineering
Online | 21-24 September 2020

Abstract CPOTE2020-1088-A

Book of abstracts draft
slider slider slider slider slider slider

Experimental research and CFD analysis of selective catalytic reduction of nitric oxides in the original SCR system and WALKER’s replacement

Damian KURZYDYM, Silesian University of Technology, Poland
Adam KLIMANEK, Silesian University of Technology, Poland
Zbigniew ŻMUDKA, Silesian University of Technology, Poland

The article presents comparative study of nitrogen oxides removal systems based on selective catalytic reduction (SCR). The systems under investigation are an original part of a passenger car with a diesel engine and a recently developed WALKER’s replacement part. Development of a SCR system is performed by a thorough analysis of the processes and subsequent devices of the system in order to meet the desired performance and requirements of the European emission standards. For this purpose, experimental research was conducted for the SCR systems at different operational parameters. Proposed solutions were investigated under conditions that reflected the real operating conditions of the diesel engine. Among other things, gas distribution and conversion of nitrogen oxides were tested and analyzed. In the next step, laser scanning was used to extract 3D models of the real geometries. This allowed for preparing the SCR systems for comparative simulations by means of ANSYS Fluent computational fluid dynamics (CFD) software. The developed numerical model takes into account the flow of flue gases, as well as the injection, evaporation and decomposition of the urea-water solution. The geometry encompasses the inlet part, the mixer and catalyst, which was treated as a porous medium. Attention was given to the implementation of the catalytic reaction kinetics, which was represented by a global mechanism. The implementation was verified by comparison with analytical solution. The overall CFD model was then validated against the experimental data showing good agreement between the measured and simulated parameters.

Keywords: Selective catalytic reduction (SCR), Computational fluid dynamics (CFD), Reaction kinetics, Diesel engine, NOx
Acknowledgment: This work was partly supported by the Tenneco company and the Faculty of Power and Environmental Engineering of the Silesian University of Technology within the statutory research fund.