Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Decomposition of Dibenzothiophene Sulfone over KF/MgO Catalysts

KF/MgO 촉매를 이용한 Dibenzothiophene Sulfone 분해반응

  • Kim, Hyeon-Joo (Department of Chemical Engineering, Kongju National University) ;
  • Jeong, Kwang-Eun (Green Chemistry Research Division, Korea Research Institute of Chemical Technology) ;
  • Jeong, Soon-Yong (Green Chemistry Research Division, Korea Research Institute of Chemical Technology) ;
  • Park, Young-Kwon (School of Environmental Engineering, University of Seoul) ;
  • Jeon, Jong-Ki (Department of Chemical Engineering, Kongju National University)
  • 김현주 (공주대학교 화학공학부) ;
  • 정광은 (한국화학연구원 그린화학연구단) ;
  • 정순용 (한국화학연구원 그린화학연구단) ;
  • 박영권 (서울시립대학교 환경공학부) ;
  • 전종기 (공주대학교 화학공학부)
  • Received : 2009.12.21
  • Accepted : 2010.02.11
  • Published : 2010.03.31
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Abstract

The object of the present study is to apply KF/MgO catalysts to remove sulfur dioxide from dibenzothiophene sulfone, a by-product of oxidative desulfurization. Potassium fluoride was deposited via an impregnation method on MgO. The effects KF loading and calcination on the characteristics of the KF/MgO catalysts were investigated through the BET surface area, XRF, XRD, and temperature-programmed desorption of $CO_2$. The catalytic performances of the samples were investigated during the decomposition of dibenzothiophene sulfone to biphenyl and sulfur dioxide gas. KF loaded on MgO prepared by the impregnation method showed high catalytic activities for the decomposition of dibenzothiophene sulfone. The higher activity of KF/MgO just dried at 373 K, avoiding the usual activation at high temperature, than that over the calcined catalyst is ascribed to increase of the amount of basic sites. The high basicity probably may be due to the coordinately unsaturated $F^-$. The simply dried 10 % KF/MgO catalyst, without the usual activation at high temperature, showed the optimal catalytic properties.

본 연구의 목적은 산화탈황 공정의 부산물인 dibenzothiophene sulfone의 분해반응용 KF/MgO 촉매를 개발하는 것이다. MgO 지지체에 KF를 담지시켜 KF/MgO 촉매를 제조하였다. KF 담지량 및 소성 효과 등이 촉매 특성에 미치는 영향을 BET표면적, XRF, XRD, 이산화탄소 승온탈착 실험 등을 통해서 분석하였다. Dibenzothiophene sulfone을 biphenyl 과 이산화황으로 분해하는 반응에서의 촉매 특성을 조사하였다. MgO 촉매에 KF를 담지하면 DBTS 분해반응 활성이 증가하였다. KF/MgO 촉매를 제조하여 373 K에서 건조과정만 거친 촉매의 활성이 고온에서 소성을 거친 촉매의 활성보다 높았으며, 이는 fluoride 이온 ($F^-$)이 염기도를 증가시키는 역할을 하기 때문으로 판단된다. KF를 10 wt% 담지한 촉매가 dibenzothiophene sulfone 분해 반응에서 가장 뛰어난 활성을 보였다.

Keywords

References

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