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Korean Journal of Chemical Engineering

, Volume 12, Issue 5, pp 497–502 | Cite as

Characterization of hydrodesulfurization catalyst prepared by impregnating cobalt nitrate solution onto the sulfided MoO3/Al2O3 catalyst

  • Seong Ihl Woo
  • Seo Kim
  • Choong-Hyon Kim
Article

Abstract

CoMo/Al2O3 catalysts were prepared by impregnating Cobalt nitrate solution into oxidic or sulfided Mo/Al2O3. The properties of CoMo/Al2O3 catalysts were characterized by XRD, TPS, oxygen chemisorption and ESR. Catalytic activity of CoMo/Al2O3 catalyst was evaluated by thiophene HDS as a probe reaction. When CoMo/Al2O3 catalyst was prepared by impregnating Cobalt nitrate solution into sulfided Mo/Al2O3, the interaction between Mo and alumina became weaker and the formation of synergic phase was facilitated. These structural changes may explain higher HDS activity of CoMo/Al2O3 catalyst prepared by impregnating Cobalt nitrate solution into sulfided Mo/Al2O3.

Key words

Hydrodesulfurization CoMo/Al2O3 TPS XRD ESR 

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References

  1. Arnoldy, P., van den Heikant, J. A. M., de Bok, G. D. and Moulijn, J. A., “Temperature-Programmed Sulfiding of MoO3/Al2O3 Catalysts”,J. Catal.,92, 35 (1985a).CrossRefGoogle Scholar
  2. Arnoldy, P., van den Heikant, J. A. M., de Bok, G. D. and Moulijn, J. A., “Temperature-Programmed Sulfiding and Reduction of CoO/Al2O3 Catalysts”,J. Catal.,96, 122 (1985b).CrossRefGoogle Scholar
  3. Bharduri, M. and Mitchell, P. C. H., “The Effect of Treatment with Triethylaluminium on the Hydrogenation and Hydrodesulfurization Activity of Molybdenum, Cobalt, and Nickel Sulfide Catalysts”,J. Catal.,77, 132 (1982).CrossRefGoogle Scholar
  4. Bhaduri, M., Hernandez, J. and Thomas, W. J., “The Effect of Composition on the Activity of a Cobalt Molybdate Hydrodesulphurisation Catalyst”,Appl. Catal.,8, 85 (1983).CrossRefGoogle Scholar
  5. Caceres, C. V., Fierro, J. L G., Blanco, M. N. and Thomas, H. J., “Influence of the Preparation Conditions on the Surface Properties of HDS Catalysts”,Appl. Catal.,10, 333 (1984).CrossRefGoogle Scholar
  6. Caceres, C. V., Fierro, J. L. G., Agudo, A. L., Blanco, M. N. and Thomas, H. J., “Preparation and Characterization of Equilibrium Adsorption-Prepared Molybdena-Alumina Catalysts”,J. Catal.,95, 501 (1985).CrossRefGoogle Scholar
  7. Candia, R., Sorensen, O., Villadsen, J., Topsoe, N. Y., Clausen, B. S. and Topsoe, H., “Effect of Sulfiding Temperature on Activity and Structures of Co-Mo/Al2O3 Catalysts. II”,Bull. Soc. Chim. Belg.,93, 763 (1984a).CrossRefGoogle Scholar
  8. Candia, R., Topsoe, H. and Clausen, B. S.,“Proc. of the 9th Iberinoamerica Symp. on Catalysts”, Lisbon, Portugal, p 211, 1984b.Google Scholar
  9. Chung, K. and Massoth, F. E., “Studies on Molybdena-Alumina Catalysts: VII. Effect of Cobalt on Catalyst States and Reducibility”,J. Catal. 64, 320 (1980a).CrossRefGoogle Scholar
  10. Chung, K. and Massoth, F. E., “Studies on Molybdena-Alumina Catalysts: VIII. Effect of Cobalt on Catalyst Sulfiding”,J. Catal.,64, 332 (1980b).CrossRefGoogle Scholar
  11. de Beer, V. H. J., van sint Fiet, T. H. M., van der Steen, G. H. A. M., Zwaga, A. C. and Schuit, G. C. A., “The CoO3-MoO3-γ-Al2O3 Catalyst: V. Sulfide Catalysts Promoted by Cobalt, Nickel, and Zinc”,J. Catal.,35, 297 (1974).CrossRefGoogle Scholar
  12. de Beer, V. H. J., Bebelander, C., van sint Fiet, T. H. M., Werter, P. G. A. J. and Amberg, C. H., “The CoO-MoO3-γ-Al2O3 Catalyst: VI. Sulfur Content Analysis and Hydrodesulfurization Activities”,J. Catal.,43, 68 (1976a).CrossRefGoogle Scholar
  13. de Beer, V. H. J., van der Aalst, M. J. M., Machiels, C. J. and Schuit, G. C. A., “The CoO-MoO3-γ-Al2O3 Catalyst: VII. Influence of the Support”,J. Catal.,43, 78 (1976b).CrossRefGoogle Scholar
  14. Derouane, E. G., Pedersen, E., Clausen, B. S., Gabelica, Z., Candia, R. and Topsoe, H., “EPR Studies on Unsupported and Alumina-Supported Sulfided Co-Mo Hydrodesulfurization Catalysts”,J. Catal.,99, 253 (1986).CrossRefGoogle Scholar
  15. Duchet, J. C., van Oers, E. M., de Beer, V. H. J. and Prins, R., “Carbon-Supported Sulfide Catalysts”,J. Catal.,80, 386 (1983).CrossRefGoogle Scholar
  16. Gajardo, P., Mathieux, A., Grange, P. and Delmon, B., “Structure and Catalytic Activity of CoMo/gg-A12O3 and CoMo/SiO2 Hydrodesulphurization Catalysts: An XPS and ESR Characterization of Sulfided Used Catalysts”,Appl. Catal.,3, 347 (1982).CrossRefGoogle Scholar
  17. Gates, B. C., Katzer, J. R. and Schuit, G. C. A., “Chemistry of Catalytic Processes”, McGraw-Hill, New York, 1979.Google Scholar
  18. Kim, S. I. and Woo, S. I., “Effect of Sulfiding Temperatures on the Formation of Sulfides of Mo/Al2O3 and CoMo/Al2O3”,Appl. Catal.,74, 109 (1991a).CrossRefGoogle Scholar
  19. Kim, S. I. and Woo, S. I., “Characterization of Alumina Modified with Sulfate and Phosphate”,KJChE,8, 177 (1991b).Google Scholar
  20. Kim, S. I. and Woo, S. I., “The Effect of Modifying Alumina with Sulfate and Phosphate on the Catalytic Properties of Mo/Al2O3 in HDS Reaction”,J. Catal.,133, 124 (1992).CrossRefGoogle Scholar
  21. Konings, A. J. A., Brentjens, W. L. J., Koningsberger, D. C. and de Beer, V. H. J., “ESR Studies on Hydrodesulfurization Catalysts: Nickel- or Cobalt-Promoted Sulfided Tungsten- or Molybdenum-Containing Catalysts”,J. Catal.,67, 145 (1981).CrossRefGoogle Scholar
  22. Konings, A. J. A., Valster, A., de Beer, V. H. J. and Prins, R., “Hydrodesulfurization Catalysts Prepared from X(MS4)2- 2 Thioheteroanions Containing Ni or Co and Mo or W: Correlation of ESR Signal Intensity with Thiophene Conversion”,J. Catal.,76, 466 (1982).CrossRefGoogle Scholar
  23. Lo Jacono, M., Verbeek, J. L. and Schuit, G. C. A., “Investigations on Cobalt-Alumina and Cobalt-Molybdenum-Alumina: Electron Spin Resonance of the Oxidized, Sulfided, and Reduced Catalysts”,J. Catal.,29, 463 (1973).CrossRefGoogle Scholar
  24. Okamoto, Y., Oh-hara, M., Maezawa, A., Imanaka, T. and Teranishi, S., “H2S Adsorption on A12O3, Modified A12O3, and MoO3Al2O3”,J. Phys. Chem.,90, 2396 (1986).CrossRefGoogle Scholar
  25. Oliver, S. W., Smith, T. D., Pilbrow, J. R., Pratt, K. C. and Christov, V., “An Electron Spin Resonance Study of the Catalyzed Hydrodesulfurization of Thiophene Using Sulfided Molybdenum Oxide on a Zirconia Support”,J. Catal.,111, 88 (1988).CrossRefGoogle Scholar
  26. Pollack, S.S., Makovsky, L.E. and Brown, F. R., “Identification by X-Ray Diffraction of MoS2 in Used CoMo-Al2O3 Desulfurization Catalysts”,J. Catal.,59, 452 (1979).CrossRefGoogle Scholar
  27. Scheffer, B., Arnoldy, P. and Moulijn, J. A., “Sulfidability and Hydrodesulfurization Activity of Mo Catalysts Supported on Alumina, Silica, and Carbon”,J. Catal.,112, 516 (1988).CrossRefGoogle Scholar
  28. Schrader, G. L. and Cheng, C. P., “In Situ Laser Raman Spectroscopy of the Sulfiding of Mo/gg-A12O3 Catalysts”,J. Catal.,80, 369 (1983).CrossRefGoogle Scholar
  29. Stuchly, V., Zahradnikova, H. and Beranek, I., “Activation of a Hydrorefining Cobalt-Molybdenum Catalyst: I. Formation of Surface Groups and Sites during Activation”,Appl. Catal.,35, 23 (1987).CrossRefGoogle Scholar
  30. Yoshimura, Y., Furimsky, F. E. and Sato, T., Shimada, H., Matsubayashi, N. and Nishijima, A.,“Proc. of the 9th International Congress on Catalysis”, Calgary, Canada, p. 136 (1988).Google Scholar

Copyright information

© Korean Institute of Chemical Engineering 1995

Authors and Affiliations

  • Seong Ihl Woo
    • 1
  • Seo Kim
    • 1
  • Choong-Hyon Kim
    • 1
  1. 1.Department of Chemical EngineeringKorea Advanced Institute of Science and TechnologyTaejonKorea

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