Numerical Simulation on Effect of Heating Temperature upon the Gaseous Flow in SCR Catalytic Filter Device

Document Number: 2009-01-2628

Date Published: November 2009

Author(s):
Myung-Whan Bae - Gyeongsang National Univ.
Syaiful Syaiful - Gyeongsang National Univ.

Abstract:
Selective catalytic reduction (SCR) and diesel particulate filter (DPF) as a compact system are used to reduce NO\dx and soot emissions, respectively. The aim of this study is to develop an SCR catalytic filter device for reducing simultaneously NO\dx and soot emissions from a combustor. In order to attain the optimal NO\dx conversion, the amount of ammonia must be managed to the amount of NO\dx on catalyst surface. If the amount of ammonia is higher than that of NO\dx, ammonia slip will be presented. Therefore, the uniform ammonia distribution around the catalyst is one of the challenges for the SCR application. Temperature is also a sensitive parameter in the reaction rate of NO\dx with ammonia. In this paper, the heating effect on the gaseous flow in the SCR catalytic filter device is studied with the uniformity of ammonia distribution. As a result, it is found that the temperature around catalytic filters is lower at Re \me 4255 than that at Re \me 64. The result also shows that the mixing index decreases as increasing the heating temperature in SCR device.

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Product Status: In Stock

See other papers presented at SAE 2009 Powertrains Fuels and Lubricants Meeting, November 2009, San Antonio, TX, USA, Session: Exhaust System Modeling

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