Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on the Reaction Characteristics and Efficiency Improvement of High-temperature SCR Catalyst

고온 SCR 촉매의 반응 특성 및 효율 증진에 관한 연구

  • Nam, Ki Bok (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Kang, Youn Suk (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Kyonggi University)
  • 남기복 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 강연석 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 홍성창 (경기대학교 환경에너지시스템공학과)
  • Received : 2015.08.12
  • Accepted : 2015.09.16
  • Published : 2015.12.10
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Abstract

In this paper the selective reduction catalyst (SCR) for controlling the NOx at high temperature range was studied. XRD and FT-IR BET analysis was also performed to determine the structural properties and adsorption/desorption characteristics of the catalyst. In the case of anatase $TiO_2$ support, a negligible NOx conversion was observed, but the $W/TiO_2$ catalyst made using W as a active metal showed an excellent ability to remove NOx. In particular, the $W/TiO_2$ exhibited a rapid increase in the catalytic activity due to the presence of W for the NOx conversion compared to that of using the pure $TiO_2$ at a high temperature range over $400^{\circ}C$. In addition, the phenomenon of reduced reaction activity due to the heat shock for a long time was found to be suppressed.

본 연구에서는 고온영역에서 NOx를 제어하기 위한 선택적 환원촉매(SCR)의 연구를 수행하였다. 제조된 촉매들의 구조적 특성 및 흡 탈착 특성을 확인하기 위하여 XRD, FT-IR 분석을 수행하였다. Anatase $TiO_2$ 지지체의 경우 미미한 NOx 전환율을 나타내었으며, 이에 W을 활성금속으로 하여 제조한 $W/TiO_2$ 촉매에서 우수한 NOx 제거 능력을 보였다. 특히 $400^{\circ}C$ 이상의 고온영역에서 순수 $TiO_2$의 NOx 전환율보다 W이 함유된 $W/TiO_2$의 촉매에서 급격한 활성 증가를 확인할 수 있었다. 또한, 장시간의 열충격에 따른 반응활성이 감소되는 현상이 억제됨을 확인하였다.

Keywords

References

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