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http://dx.doi.org/10.9726/kspse.2015.19.6.026

De-NOx Characteristics of V2O5 SCR according to the Ratio of TiO2 Crystal Structures  

Seo, Choong-Kil (Department of Automotive & Mechanical Engineering, Howon university)
Bae, Jaeyoung (Chemistry, Keimyung University)
Publication Information
Journal of Power System Engineering / v.19, no.6, 2015 , pp. 26-32 More about this Journal
Abstract
The purpose of this study is to investigate the de-NOx performance characteristics according to the $TiO_2$ crystal structures ratio of $V_2O_5$ SCR catalysts. The anatase(100%) SCR catalyst showed the highest desorption peak of 80ppm at about $250^{\circ}C$, and $NH_3$ was not desorbed at $500^{\circ}C$. It can be confirmed that there was many $NH_3$ desorbed at a high temperature among other various crystal structures, which is because the catalyst was more acidized to increase the intensity of acid sites as the content of subacid sulfate ions($NH_2SO_4$) in the rutile phase increases. The anatase/rutile(7%/93%) SCR had the smallest width of de-NOx performance drop according to thermal aging, and had strong durability against thermal aging.
Keywords
Diesel engine; Catalyst; SCR; $TiO_2$; Structure;
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Times Cited By KSCI : 2  (Citation Analysis)
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