Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Comparison of efficiencies of converting urea solution to ammonia depending on active catalyst metals on TiO2

타이타니아 담지 활성촉매에 따른 요소 수용액의 암모니아 전환 효율 비교

  • Lee, Myung Sig (Graduate School of Energy and Environment, Seoul National University of Science & Technology) ;
  • Pak, Daewon (Graduate School of Energy and Environment, Seoul National University of Science & Technology)
  • 이명식 (서울과학기술대학교 에너지환경대학원) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원)
  • Received : 2018.02.14
  • Accepted : 2018.03.16
  • Published : 2018.03.30
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Abstract

In this study, selective catalytic reductions (SCR) of NO commercial catalysts were used to investigate the effect of ammonia gasification from urea solution. The effects of catalytic chemical composition on the reaction temperature and space velocity were studied. $V_2O_5/TiO_2$ catalysts, which are widely used as SCR catalysts for removal of nitrogen oxides, have better ammonia formation compare to $TiO_2$ and $WO_3-V_2O_5/TiO_2$ catalysts. The $TiO_2$ catalyst not supporting the active metal was not affected by the space velocity as compared with the catalyst supporting $V_2O_5$ or $WO_3-V_2O_5$. The active metal supported catalysts decreased in the ammonia formation as the space velocity increased.

본 연구에서는 질소산화물 제거용 환원제로 사용하는 요소 수용액을 암모니아로 전환하는데 있어 SCR 상용촉매의 활용가능성을 확인하기위해 촉매조성에 따른 반응온도, 공간속도의 영향에 대한 연구를 수행하였다. 연구결과 SCR 촉매로 널리 사용되는 $V_2O_5/TiO_2$ 촉매는 $TiO_2$ 및 $WO_3-V_2O_5/TiO_2$ 촉매에 비해 암모니아 생성이 우수함을 보였다. 활성금속을 담지하지 않은 $TiO_2$ 촉매는 $V_2O_5$ 혹은 $WO_3-V_2O_5$를 담지 한 촉매에 비해 공간속도에 따른 암모니아 전환에 영향을 받지 않는 것으로 나타났으며, 활성금속을 담지 한 촉매는 공간속도가 증가함에 따라 암모니아 생성 농도가 감소됨을 확인하였다.

Keywords

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