화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.11, No.1, 1-9, January, 2005
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State of the Art of de-NOx Technology Using Zeolite Catalysts in Automobile Englines
Byung-Chul Choi†, and David E. Foster1
  • School of Mechanical Systems Engineering, Chonnam National University, Gwangju 500-757, Korea
  • 1Engine Research Center, University of Wisconsin-Madison, WI 53705, USA
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This review focuses on recent aspects of the use of precious metals or metal ion-exchanged zeolites as de-NOx catalysts. We focus especially on the NO conversion efficiency of precious metal ion-exchanged zeolites and reactions of NOx with hydrocarbon reactants over metal ion-exchanged zeolite catalysts as a function of reaction temperature. We discuss the possibility of realizing automotive catalysts from such metal ion-exchanged zeolite catalysts performed very well in the reduction of NOx when water vapor was present. The effectivity of reduction reactants for the NO conversion on zeolite catalysts decrease in the order aromatics > olefins > paraffins. The present NO conversion values suggest the possibility for development of de-NOx catalysts for future lean-burning engines using ZSM-5 catalysts.
Keywords:catalyst;diesel engine;emission;after-treatment;NOx;zeolite;ZSM-5
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