Catalysis Letters

, Volume 130, Issue 3–4, pp 403–409

Slurry-Phase Fischer–Tropsch Synthesis Using Co/γ-Al2O3, Co/SiO2 and Co/TiO2: Effect of Support on Catalyst Aggregation

  • Jong-Hyeok Oh
  • Jong Wook Bae
  • Seon-Ju Park
  • P. K. Khanna
  • Ki-Won Jun
Article

DOI: 10.1007/s10562-009-0021-0

Cite this article as:
Oh, JH., Bae, J.W., Park, SJ. et al. Catal Lett (2009) 130: 403. doi:10.1007/s10562-009-0021-0

Abstract

The catalytic performance of Co/γ-Al2O3, Co/SiO2 and Co/TiO2 catalysts has been investigated in a slurry-phase Fischer–Tropsch Synthesis (FTS). Although Co/SiO2 catalyst shows higher CO conversion than the other catalysts, the intrinsic activity is much higher on Co/TiO2 due to large pore size and low deactivation of large cobalt particles by reoxidation mechanism. Co/γ-Al2O3 catalyst confirms low formation rate of oxygenates and C5+ selectivity because of deactivation of catalyst due to catalyst aggregation and reoxidation by the in situ generated water during the FTS reaction. Long-chain hydrocarbons such as wax formed during FTS reaction generally contains water and trace amount of oxygenate which are conducive to the formation of a macro-emulsion of wax products. Formation of such macro-emulsion on the catalyst suggests that the presence of proper amount of alcohol content derived FTS reaction on large pore of catalyst inhibits the catalyst aggregation. The intrinsic activity (turn-over frequency; TOF) of cobalt-based catalysts, in a slurry-phase FTS reaction, is affected by the average pore size of catalyst, cobalt particle size, degree of reduction of cobalt species and possible reoxidation by in situ generated water.

Keywords

Fischer–Tropsch synthesis Turn-over frequency Pore size of catalyst Slurry-phase reaction Product distribution 

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Jong-Hyeok Oh
    • 1
  • Jong Wook Bae
    • 1
  • Seon-Ju Park
    • 1
  • P. K. Khanna
    • 1
    • 2
  • Ki-Won Jun
    • 1
  1. 1.Petroleum Displacement Technology Research CenterKorea Research Institute of Chemical Technology (KRICT)Yuseong, DaejeonKorea
  2. 2.Nanoscience LaboratoryCenter for Materials for Electronics Technology (C-MET)PuneIndia

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