An investigation into supercritical fluids as a reaction media for Fischer Tropsch synthesis

J. E. Durham, Nimir O. Elbashir, Christopher B. Roberts

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The influence of temperature, pressure, H2/CO ratio, synthesis gas rate, and supercritical fluid media (pentanes and hexanes) on conversion and product distribution was studied. The supercritical fluid media showed comparable conversion to the gas phase, higher selectivity in the middle distillate fraction (gasoline and diesel), and lower methane and other light hydrocarbon selectivity. To explain this increase in selectivity an enhanced olefin reincorporation model has been proposed. The influence of catalyst surface characteristics on the FTS reaction was evaluated. Three cobalt catalysts were investigated: 15% cobalt on high surface area silica, 15% cobalt on low surface area silica, and 15% cobalt on alumina. These catalysts performed differently in the gas phase, but nearly identically in the supercritical phase. The supercritical hexane reaction media alleviates intra-particle transport limitations. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

Original languageEnglish
Title of host publication2006 AIChE Annual Meeting
Publication statusPublished - 2006
Externally publishedYes
Event2006 AIChE Annual Meeting - San Francisco, CA, United States
Duration: 12 Nov 200617 Nov 2006


Other2006 AIChE Annual Meeting
CountryUnited States
CitySan Francisco, CA


ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Bioengineering
  • Safety, Risk, Reliability and Quality

Cite this

Durham, J. E., Elbashir, N. O., & Roberts, C. B. (2006). An investigation into supercritical fluids as a reaction media for Fischer Tropsch synthesis. In 2006 AIChE Annual Meeting