Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study of Simultaneous Reaction for NOx, Soot and Thermal Shock according to Pt Catalyst's Supports

담체에 따른 Pt 촉매의 NOx, soot 동시 반응특성과 열충격에 관한 연구

  • Kim, Sung Su (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Park, Kwang Hee (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Bae, Se Hyun (Scentec) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Kyonggi University)
  • 김성수 (경기대학교대학원 환경에너지시스템공학과) ;
  • 박광희 (경기대학교대학원 환경에너지시스템공학과) ;
  • 배세현 ((주)센텍) ;
  • 홍성창 (경기대학교 환경에너지시스템공학과)
  • Received : 2009.05.27
  • Accepted : 2009.06.26
  • Published : 2009.08.10
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Abstract

In this work, thermal shock and simultaneous removal reaction for NOx, soot over Pt catalysts using $TiO_2$, $Al_2O_3$ as support were studied. The catalytic reaction test for NOx and soot were also performed independently and simultaneously, as a result, it showed different NOx removal efficiency and soot oxidation rate according to support and phase, and the onset temperature of soot oxidation has correlation to NOx removal efficiency for the catalyst. The onset temperature of soot oxidation shifted to lower temperature by generated $NO_2$ at the simultaneous reaction for NOx and soot. Also Pt/$TiO_2$ catalyst is more affected than Pt/$Al_2O_3$ on NOx removal efficiency caused by thermal shock while Pt sintering effect induced to reduce the performance on soot oxidation rate for all catalysts.

$TiO_2$, $Al_2O_3$를 담체로 한 Pt계 촉매에서 NOx, soot의 동시 제거 반응과 촉매의 열충격에 대한 연구를 수행하였다. 실험은 NOx와 soot의 반응을 독립 또는 동시에 반응시킨 조건으로 수행하였으며 그 결과 담체의 종류 및 상에 따라서 서로 상이한 NOx 제거능력과 soot 산화력을 나타내었고, soot의 산화시작온도의 결정은 NOx 제거능력과 상관관계가 있었다. NOx, soot의 동시 반응 시에는 생성된 $NO_2$에 의하여 soot 산화시작온도가 저온으로 이동하였다. 또한 열충격에 대한 NOx 제거율은 Pt/$Al_2O_3$ 촉매가 Pt/$TiO_2$ 촉매에 비하여 효율저하가 적게 일어났으며 soot 산화력은 활성점인 Pt의 소결현상에 의하여 촉매에 관계없이 모두 감소하였다.

Keywords

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