Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Enhanced NH3-SCR Activity of V/TiO2 Catalyst Prepared by Various Ball Mill Method

다양한 Ball Mill Method에 의해 제조된 V/TiO2 촉매의 NH3-SCR 활성 증진연구

  • Kim, Dong Ho (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Seo, Phill Won (Department of Research & Development, Ceracomb Co., Ltd.) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Kyonggi University)
  • 김동호 (경기대학교 일반대학원 환경에너지공학과) ;
  • 서필원 ((주)세라컴 기술연구소) ;
  • 홍성창 (경기대학교 환경에너지공학과)
  • Received : 2017.01.06
  • Accepted : 2017.02.08
  • Published : 2017.03.31
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Abstract

In this study, the selective catalytic reduction (SCR) for NOx removal was investigated in the temperature range of $150{\sim}400^{\circ}C$. XRD, BET and XPS analyses to determine the structural properties and valence state characteristics of the catalyst were performed. Various ball mill method were shown to a difference in activity at a low temperature below $250^{\circ}C$. Based on the catalyst with the highest denitrification efficiency, the ball mill time was the best result at 3 h. As a result of XPS analysis, the presence of the non-stoichiometric vanadium species and the increase of the number of atoms were attributed to a positive effect in the SCR reaction. it was confirmed that the correlation between the amount of lattice oxygen and the denitrification efficiency through the $O_2$ on-off experiment, and it was in a proportional relationship to each other.

본 연구에서는, $150{\sim}400^{\circ}C$ 영역에서 $NO_x$를 제어하기 위한 ball mill 기법을 사용한 선택적 환원촉매(SCR)의 연구를 수행하였다. 제조된 촉매들의 구조적 특성 및 산화가 특성을 확인하기 위하여 XRD, BET, XPS 분석을 수행하였다. 다양한 ball mill 기법에 의해 제조된 촉매는 $250^{\circ}C$ 이하의 온도구간에서의 활성의 차이를 보였다. 이중 가장 우수한 탈질효율을 갖는 촉매를 기준으로, ball mill 시간이 3시간일 때 가장 높은 활성을 나타내었다. XPS 분석 결과, vanadium의 비 화학양론종의 존재 및 원자 수 증가가 활성증진에 유리하게 작용한 것으로 나타났다. 또한 $O_2$ on-off 실험을 통해 격자산소량의 양과 탈질 효율과의 상관관계를 나타내었고, 이는 서로 비례관계에 있음을 확인하였다.

Keywords

References

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