A Study on the Reaction between Carbon Monoxide and Nitric Oxide on Platinum Catalyst

백금촉매상에서 일산화탄소와 일산화질소의 반응에 관한 연구

  • Park, Youn-Seok (Samsung General Chemicals Research Center) ;
  • Kim, Young-Ho (Department of Chemical Technology, Seoul National University) ;
  • Lee, Ho-In (Department of Chemical Technology, Seoul National University)
  • 박윤석 (삼성종합화학연구소) ;
  • 김영호 (서울대학교 공과대학 공업화학과) ;
  • 이호인 (서울대학교 공과대학 공업화학과)
  • Received : 1990.11.30
  • Published : 1990.12.31

Abstract

The catalytic reaction between CO and NO on polycrystalline Pt surface, which is very important in the development of catalyst for automobile exhaust gas control, has been studied using thermal desorption spectrometry(TDS) and steady-state experiment under ultra-high vacuum(UHV) conditions. With the pressures of CO and NO of each $1{\times}10^{-7}Torr$, the $CO_2$ formation rate showed a maximum at 560K. At the reaction temperature of 560K and the NO pressure of $1{\times}10^{-7}Torr$, the production of $CO_2$ was first order in $CO_2$ was first order in CO pressure below $1.35{\times}10^{-7}Torr$ of CO pressure whereas at higher CO pressures the rate became minus 0.3 order in CO. But the efforts of reactant pressure on the reaction was understood in consideration of the surface concentrations of adsorbates. With the results, we proposed a new reaction mechanism for this reaction.

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Acknowledgement

Supported by : 서울대학교