Poisoning of cobalt catalyst used for Fischer-Tropsch synthesis

Dennis E. Sparks, Gary Jacobs, Muthu Kumaran Gnanamani, Venkat Ramana Rao Pendyala, Wenping Ma, Jungshik Kang, Wilson D. Shafer, Robert A. Keogh, Ursula M. Graham, Pei Gao, Burtron H. Davis

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Sulfur in the form of H2S has been added at various concentration levels during cobalt Fischer-Tropsch synthesis. A steady-state FTS conversion was established prior to adding H2S. At low levels (<500 ppb) H2S addition does not cause a detectable decrease in activity during 5-10 days of exposure to H2S. Above the threshold limit of about 500 ppb, the rate of decrease in CO conversion is linearly related to the H2S concentration in the gas feed. At H2S levels in the 500-1000 ppb range, it appears that the poisoning effect is reversible so that catalytic activity is recovered when the addition of H 2S is terminated.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalCatalysis Today
StatePublished - Oct 15 2013


  • Catalyst poison
  • Cobalt catalyst
  • Fischer-Tropsch synthesis
  • Hydrogen sulfide
  • Threshold poisoning level

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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