Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on the Reaction Characteristics of the NH3 Oxidation over W/TiO2

W/TiO2 촉매의 NH3 단독 산화 반응 특성 연구

  • Kim, Geo Jong (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Lee, Sang Moon (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Kyonggi University)
  • 김거종 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 이상문 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 홍성창 (경기대학교 환경에너지시스템공학과)
  • Received : 2013.08.07
  • Accepted : 2013.09.16
  • Published : 2013.12.10
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Abstract

In this study, we investigated the $NH_3$ oxidation reaction characteristic over $W/TiO_2$ catalyst in order to control $NH_3$ generated from a thermoelectric power plant or incinerator. As a result, it was found that the optimal content of tungsten in $W/TiO_2$ catalyst is 10 wt% and $NH_3$ removal efficiency decreased due to decreasing specific surface areas of catalyst with increasing tungsten contents. When $NH_3$ was injected more than 420 ppm, $NH_3$ conversion decreased at the middle temperature range. In addition, $NH_3$ conversion decreased due to the competitive adsorption of moisture and with increasing oxygen concentration, the $NH_3$ conversion increased while the $N_2$ selectivity decreased.

본 연구에서는, 화력발전소 및 소각로 후단에서 발생되는 $NH_3$를 제어하기 위한 $W/TiO_2$ 촉매의 $NH_3$ 산화 반응 특성 연구를 수행하였다. 그 결과, $W/TiO_2$ 촉매의 텅스텐 최적함량은 10 wt% 임을 도출하였으며, 그 이상의 텅스텐을 담지 할 경우 비표면적의 감소로 인한 효율저하를 확인하였다. 또한, $NH_3$ 주입농도가 420 ppm 이상으로 주입될 경우 중 저온의 온도구간에서 효율저하를 나타냈으며, 수분이 존재할 경우 경쟁흡착으로 인한 효율저하가 발생하였고 산소농도가 증가할수록 $NH_3$의 전환율은 우수해지지만 $N_2$의 선택도가 낮아짐을 확인하였다.

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References

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