Low Temperature Selective Catalytic Reduction of NO with $NH_3$ over Mn/$CeO_2$ and Mn/$ZrO_2$

Mn/$CeO_2$와 Mn/$ZrO_2$ 촉매 상에서 $NH_3$를 사용한 NO의 선택적 촉매 산화 반응

  • Ko, Jeong Huy (Graduate School of Energy and Environmental System Engineering, University of Seoul) ;
  • Park, Sung Hoon (Department of Environmental Engineering, Sunchon National University) ;
  • Jeon, Jong-Ki (Department of Chemical Engineering, Kongju National University) ;
  • Sohn, Jung Min (Department of Mineral Resources and Energy Engineering, Chonbuk National University) ;
  • Lee, See-Hoon (Department of Mineral Resources and Energy Engineering, Chonbuk National University) ;
  • Park, Young-Kwon (Graduate School of Energy and Environmental System Engineering, University of Seoul)
  • 고정휘 (서울시립대학교 에너지환경시스템 공학과) ;
  • 박성훈 (순천대학교 환경공학과) ;
  • 전종기 (공주대학교 화학공학부) ;
  • 손정민 (전북대학교 자원에너지 공학과) ;
  • 이시훈 (전북대학교 자원에너지 공학과) ;
  • 박영권 (서울시립대학교 에너지환경시스템 공학과)
  • Published : 2012.02.10

Abstract

Manganese (Mn) catalysts were generated using $CeO_2$ and $ZrO_2$supports synthesized by the supercritical hydrothermal method and two different Mn precursors, aimed at an application for a low-temperature selective catalytic reduction process. Manganese acetate (MA) and manganese nitrate (MA) were used as Mn precursors. Effects of the kind and the concentration of the Mn precursor used for catalyst generation on the NOx removal efficiency were investigated. The characteristics of the generated catalysts were analyzed using $N_2$ adsorption-desorption, thermo-gravimetric analysis, X-ray diffraction, and X-ray photoelectron spectroscopy. De-NOx experiments were carried out to measure NOx removal efficiencies of the catalysts. NOx removal efficiencies of the catalysts generated using MA were superior to those of the catalysts generated using MN at every temperature tested. Analyses of the catalyst characteristics indicated that the higher NOx removal efficiencies of the MA-derived catalysts stemmed from the higher oxygen mobility and the stronger interaction with support material of $Mn_2O_3$ produced from MA than those of $MnO_2$ produced from MN.

Keywords

De-NOx;SCR;Mn/$CeO_2$;Mn/$ZrO_2$;hydrothermal synthesis in supercritical water

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