Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Characteristics of Oxidative Desulfurization(ODS) of Sulfur Compounds in Diesel Fuel over Ti-grafted SBA-15 Catalyst

Ti-grafted SBA-15 촉매를 이용한 경유유분 중의 황화합물의 선택산화탈황 특성

  • 조진수 (한국화학연구원 석유대체연구센터) ;
  • 정광은 (한국화학연구원 석유대체연구센터) ;
  • 채호정 (한국화학연구원 석유대체연구센터) ;
  • 김철웅 (한국화학연구원 석유대체연구센터) ;
  • 정순용 (한국화학연구원 석유대체연구센터) ;
  • 오성근 (한양대학교 응용화공생명공학부)
  • Received : 2008.03.26
  • Accepted : 2008.04.16
  • Published : 2008.10.31
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Abstract

Oxidative desulfurizaton of model sulfur compounds and Industrial diesel fuel(LCO; Light Cycle Oil) over Ti-grafted SBA-15 catalyst was studied in a batch reactor with tert-Butyl Hydroperoxide(TBHP) as oxidant. Effects of Ti loading, TBHP/Sulfur mole ratio, reaction temperature on ODS activity and kinetic parameters were investigated. Ti-grafted SBA-15 catalyst showed higher sulfur removal activity in the oxidative desulfurization reaction of refractory sulfur compounds(DBT and 4, 6-DMDBT) and LCO, suggesting that Ti-grafted SBA-15 catalyst could be a good candidate for ODS catalyst.

티타늄이 그라프팅(grafting)된 SBA-15 촉매(Ti-grafted SBA-15)상에서 TBHP(tert-butylhydroperoxide)를 산화제로 사용하여 회분식 반응기에서 모델 황화합물 및 실제 디젤 유분(LCO; Light Cylcle Oil)의 선택산화탈황(ODS; Oxidative Desulfurization) 반응을 수행하였으며, 티타늄 함량, 산화제/황의 몰비, 반응온도의 효과 및 반응속도상수와 활성화 에너지를 조사하였다. 티타늄이 5 wt% 도입된 Ti-grafted SBA-15 촉매는 난분해성 황화합물인 디벤조티오펜(DBT; Dibenzothiophene)과 4, 6-디메틸디벤조티오펜(4, 6-Dimethyldibenzothiophene)의 설폰(sulfone) 화합물로의 산화반응 시 표준반응조건(TBHP/S=2.5, $80^{\circ}C$, 1 atm)에서 반응개시 후 20분 뒤 100% 전환되는 우수한 활성을 나타내었다. 실제 디젤유분인 LCO를 원료로 성능 시험을 한 결과 활성이 우수하게 나타났으며 Ti-grafted SBA-15 촉매는 LCO에 함유 되어 있는 난분해성 황화합물의 선택적 산화탈황촉매로써 응용 가능성을 보였다.

Keywords

References

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