Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Influence of Active Metal Dispersion over Pt/TiO2 Catalyst on NH3-SCO Reaction Activity

Pt/TiO2 촉매의 활성금속 분산도가 NH3-SCO 반응활성에 미치는 영향

  • Shin, Jung Hun (Department of Environmental Energy Engineering, Graduate school of Kyonggi University) ;
  • Kwon, Dong Wook (Materials Architecturing Research Center, Korea Institute of Science and Technology) ;
  • Kim, Geo Jong (Department of Environmental Energy Engineering, Graduate school of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Engineering, Kyonggi University)
  • 신중훈 (경기대학교 일반대학원 환경에너지공학과) ;
  • 권동욱 (한국과학기술연구원 미래융합기술본부 물질구조제어연구센터) ;
  • 김거종 (경기대학교 일반대학원 환경에너지공학과) ;
  • 홍성창 (경기대학교 환경에너지공학과)
  • Received : 2017.09.17
  • Accepted : 2017.10.31
  • Published : 2018.02.10
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Abstract

In this study, the effect of physical properties of $Pt/TiO_2$ on $NH_3$-selective catalytic oxidation (SCO) reaction at $200{\sim}350^{\circ}C$ was investigated. CO-chemisoption and BET analysis were carried out to verify physical properties of $Pt/TiO_2$. By characterizing physical properties of $Pt/TiO_2$ with respect to the Pt loading, the metal dispersion degree decreased as a function of the Pt loading amount. Also, the catalyst having a higher metal dispersion showed an excellent conversion efficiency of $NH_3$ to $N_2$. Since the specific surface area of the support affects the metal dispersion, $Pt/TiO_2$ catalysts were prepared using $TiO_2$ with different physical properties. As a result, it was confirmed that the catalyst having a wide specific surface area exhibited a excellent conversion of $NH_3$ to $N_2$.

본 연구에서는, $200{\sim}350^{\circ}C$의 온도범위에서 $Pt/TiO_2$의 물리적 특성이 $NH_3$-selective catalytic oxidation (SCO) 반응에 미치는 영향을 확인하였다. CO-chemisorption, BET 분석은 $Pt/TiO_2$ 촉매의 물리적 특성을 확인하기 위하여 수행되었다. Pt 함량에 따른 $Pt/TiO_2$의 물리적 특성을 확인한 결과, Pt의 함량이 적을수록 분산도가 높았다. 또한 분산도가 높은 촉매는 $N_2$로의 전환율이 우수한 것을 확인하였다. 지지체의 비표면적은 분산도에 영향을 미치기 때문에, 물리적 특성이 다른 $TiO2$를 이용하여 $Pt/TiO_2$ 촉매를 제조하였다. 그 결과, 비표면적이 넓은 촉매가 $N_2$로의 전환율이 우수한 것을 확인하였다.

Keywords

References

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