Combined quantitative FTIR and online GC study of Fischer-Tropsch catalysts

Andrew I. McNab, Alan J. McCue, Davide Dionisi, James A. Anderson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
10 Downloads (Pure)


A method for the quantification of the chain length of surface hydrocarbon species on Fischer-Tropsch catalysts by in-situ FTIR was combined with online gas chromatography in order to investigate any potential relationship between adsorbed hydrocarbons species and those detected as reaction products. By varying the reaction conditions and the active metal, changes to the chain lengths of surface species and the product distribution were monitored. Results show that the species observed spectroscopically are predominantly adsorbed reaction products which do not directly relate to the detected reaction products. Hydrocarbon species which can be transported to the support material (γ-alumina) may be ascribed to oxygenated products which are not produced in detectable amounts by GC at low conversion but are selectively adsorbed from the gas phase.

Original languageEnglish
Pages (from-to)295-304
Number of pages10
JournalJournal of Catalysis
Early online date17 Aug 2017
Publication statusPublished - Sept 2017

Bibliographical note

We thank the College of physical sciences, university of Aberdeen for a studentship (to A. McNab).

Supplementary data associated with this article can be found, in
the online version, at


  • Adsorbed alkyl species
  • Cobalt catalyst
  • Fischer Tropsch
  • FTIR
  • Quantitative FTIR


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