Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Effect of Calcination Temperature of RuTi Catalysts on the Reaction Activity of NH3-SCO

RuTi 촉매의 소성온도가 NH3-SCO 반응활성에 미치는 영향

  • Shin, Jung Hun (Department of Environmental Energy Engineering, Graduate school of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Engineering, Kyonggi University)
  • 신중훈 (경기대학교 일반대학원 환경에너지공학과) ;
  • 홍성창 (경기대학교 환경에너지공학과)
  • Received : 2020.02.11
  • Accepted : 2020.03.18
  • Published : 2020.04.10
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Abstract

In this study, the effect of calcination temperature on the production of RuTi catalyst in NH3-SCO (selective catalytic oxidation) was investigated. The RuTi catalyst was prepared using the wet impregnation method, and calcined at 400~600 ℃ for 4 h in air condition. The catalysts were named RuTi x00 where x00 means the calcination temperature. According to XRD (X-Ray diffraction), TEM (transmission electron microscope), H2-TPR (H2-temperature programmed reduction) analyses, RuTi x00 catalysts displayed that the dispersion of active metal decreased via increasing the calcination temperature. The catalysts with low dispersion showed a decrease in the surface adsorption oxygen species (Oβ) and NH3 adsorption amount via XPS, and NH3-TPD analyses. Therefore, the RuTi 400 catalyst was well dispersed in the active metal on TiO2 surface, and also, the NH3 removal efficiency was excellent.

본 연구에서는, NH3-SCO (selective catalytic oxidation) 반응에서 RuTi 촉매 제조 시 소성온도에 따른 영향을 확인하였다. RuTi 촉매는 습윤 함침법을 이용하여 제조되었고, 공기 분위기에서 400~600 ℃로 4 h 동안 소성되었다. 촉매는 RuTi x00로 표기되었으며, x00는 소성온도를 의미한다. XRD, TEM, H2-TPR 분석에 따르면, RuTi x00 촉매는 소성온도가 증가할수록 활성금속의 분산도가 감소하는 것을 나타내었다. XPS, NH3-TPD 분석을 통하여, 낮은 분산도를 갖는 촉매는 표면 흡착 산소 종(Oβ) 및 NH3 흡착량이 감소하는 특성을 나타내었다. 따라서 RuTi 400 촉매는 TiO2 표면에 활성금속이 가장 잘 분산되었으며, NH3 제거 효율이 가장 우수하였다.

Keywords

References

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