Preparation and Catalytic Activity of Morphologically Controlled MoO3/SiO2 for Hydrodesulfurization

결정상과 분산도의 조절이 가능한 MoO3/SiO2 촉매의 제조 및 탈황반응특성 연구

  • Ha, Jin-Wook (Department of Chemical Engineering, College of Engineering, Soonchunhyang University)
  • 하진욱 (순천향대학교 공과대학 화학공학부)
  • Received : 1998.08.28
  • Accepted : 1998.12.23
  • Published : 1999.04.10


Several series of morphologically controlled $MoO_3$/$SiO_2$ catalysts were prepared, characterized, and tested for hydrodesulfurization (HDS) of dibenzothiophene (DBT) activity. Molybdenum surface loaded with 4.0 atoms $Mo/nm^2$ was prepared as sintered hexagonal and sintered orthorhombic, as well as a novel "well dispersed hexagonal" phase. Characterization by XRD, Raman, and $O_2$ chemisorption results reveals that the dispersion of $MoO_3$ over silica depends on the final $MoO_3$ phase in the order of; sintered hexagonal < sintered orthorhombic < dispersed hexagonal phase. Temperature programmed reduction (TPR) results show that both bulk and dispersed microcrystalline of $MoO_3$ reduce to $MoO_2$ at $650^{\circ}C$ and to Mo metal at $1000^{\circ}C$. HDS of DBT was performed in a differential reactor at 30 atm over the temperature range $350{\sim}500^{\circ}C$. Activity of $MoO_3$/$SiO_2$ toward HDS of DBT is proportional to dispersion.




Supported by : 한국학술진흥재단


  1. Catal. Sic. Jpn. v.2 T. Komaya;J. Take;Y. Yoneda
  2. J. Catal. v.133 A. Datta;J.-W. Ha;J. R. Regalbuto
  3. J. Quantum Chem. v.12 no.Sup. 2 G. C. A. Schuit
  4. 8th International Congress on Catalysis R. Candia;B. S. Clausen;J. Bartholdy;N. TopsØe
  5. J. Catal. v.35 R. Bartsch;C. Tanielia
  6. Collect. Czech. Chem. Commun. v.31 S. Landa;A. Mrnkova
  7. J. of Ind. & Eng. Chemistry v.2 J.-W. Ha
  8. Akad. Nauk. SSR v.2 R. O. Obolentsev;A. V. Mashkina
  9. Proc. 3rd World Petrol. Cong. Sect. Ⅳ C. M. Cawley
  10. Appl. Catal. v.42 S. J. Moon;S. K. Ihm
  11. Rec. Trav. Chem. Phys. v.69 H. Hong
  12. J. Catal. v.46 L. D. Rollman
  13. J. Catal. v.59 D. H. Broderick;G. C. A. Schuit;B. C. Gates
  14. J. Catal. v.77 K. Segawa;W. S. Millman
  15. J. Catal. v.77 L. Wang;W. K. Hall