Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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De-NOx Characteristics of V2O5 SCR according to the Ratio of TiO2 Crystal Structures

  • Received : 2015.07.22
  • Accepted : 2015.11.02
  • Published : 2015.12.31
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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.

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References

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