한국분말재료학회지 (Journal of Powder Materials)

  • 제18권2호
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  • Pages.159-167
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  • 2011
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지
DOI QR코드

DOI QR Code

메탄에 의한 Ag/Al2O3 촉매의 선택적 탈질 환원촉매반응에서 탈질전환율에 미치는 황화물 형성의 영향과 Mg첨가 효과

The Effects of Sulfate Formation and Mg Addition on the Selective Catalytic Reduction of NOx with CH4 on Ag/Al2O3 Catalysts

  • 최희락 (부경대학교 재료공학과) ;
  • 유창용 (한국과학기술연구원 계면엔지니어링센터) ;
  • 하헌필 (한국과학기술연구원 계면엔지니어링센터)
  • Choi, Hee-Lack (Division of materials Science and Engineering, Pukyong National University) ;
  • Yu, Chang-Yong (Interfacial engineering Center, Korea Institute of Science and Technology) ;
  • Ha, Heon-Phil (Interfacial engineering Center, Korea Institute of Science and Technology)
  • 투고 : 2011.02.18
  • 심사 : 2011.03.30
  • 발행 : 2011.04.28
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초록

The influence of sulfate on the selective catalytic reduction of $NO_x$ on the Ag/$Al_2O_3$ catalyst was studied when $CH_4$ was used as a reducing agent. Various preparation methods influenced differently on the $deNO_x$ activity. Among the methods, cogelation precipitation gave best activity. When sulfates were formed on the surfaces of samples prepared by impregnated and deposition precipitation, $deNO_x$ activity was enhanced as long as suitable forming condition is satisfied. The major sulfate formed in Ag/$Al_2O_3$ catalyst was the aluminum sulfate and it seems that this sulfate acted as a promoter. When Mg was added to the Ag/$Al_2O_3$ catalyst it promoted $deNO_x$ activity at high temperature. Intentionally added sulfate also enhanced $deNO_x$ activity, when their amount was confined less than 3 wt%.

키워드

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