Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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A Comparative Study on the NOx Removal Activities of Metal-ion-exchanged Mg/Cu-ZSM-5 Catalysts in the Treatment of Flue Gas from Stationary Sources

금속이온교환된 Mg/Cu-ZSM-5 촉매를 사용한 배연 탈질 공정에서 De-NOx활성 비교연구

  • 김재천 (경희대학교 공과대학 화학공학과) ;
  • 이병용 (경희대학교 공과대학 화학공학과) ;
  • 정석진 (경희대학교 공과대학 화학공학과)
  • Published : 1996.10.01
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Abstract

In this study, in order to make up its draw-back in Cu-ZSM-5 catalytic system, some of transition metals or alkaline earth metals were cocation-exchanged in Cu-ZSM-5. Among various cocation-ion-exchanged ZSM-5 catalysts, Mg/Cu-ZSM-5 has been found the most active and durable in NOx reduction even at high oxygen content as well as at the presence of water vapor. The role of Mg in ZSM-5 is supposed to prevent the dealumination of aluminum ions in super-cage even at harsh hydro-thermal conditions, and also it seems to stabilize the Cu ions in the structure. In order to prepare commercially available catalysts, Mg/Cu-ZSM-5 catalysts were wash-coated on the surface of honeycomb type monolith, and tested in terms of catalytic activities. As a result, it was found that the catalyst prepared bt the wash-coating showed satisfactorily high NOx conversion for the practical use in SCR process.

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References

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