The application of inelastic neutron scattering to investigate a hydrogen pre-treatment stage of an iron Fischer-Tropsch catalyst

R. Warringham, N.G. Hamilton, I.P. Silverwood, C. How, P.B. Webb, R.P. Tooze, W. Zhou, C.D. Frost, S.F. Parker, D. Lennon

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The effect of a hydrogen pre-treatment step on an iron based Fischer-Tropsch catalyst applied to the CO hydrogenation reaction at 623 and 723 K has been investigated by inelastic neutron scattering (INS). The catalyst cannot support methane production over a 6 h period of reaction at 623 K but it is active at 723 K. The INS spectrum indicates the presence of a predominantly aliphatic hydrocarbonaceous overlayer for the post-reaction 623 K sample, whereas the spectrum for the 723 K sample is assigned to an overlayer comprising partially hydrogenated polycyclic aromatic compounds. The hydrocarbonaceous overlayer associated with the active phase of the catalyst is modified by the hydrogen pre-treatment step. The INS spectra are interpreted with reference to microreactor studies, powder X-ray diffraction, temperature-programmed oxidation and transmission electron microscopy. The hydrogen pre-treatment stage favours the formation of amorphous carbon and is deemed not to convey any advantage with respect to CO hydrogenation activity.
Original languageEnglish
Pages (from-to)209-217
Number of pages9
JournalApplied Catalysis. A, General
Volume489
Early online date27 Oct 2014
DOIs
Publication statusPublished - Jan 2015

Keywords

  • Fischer–Tropsch synthesis
  • Iron catalysts
  • CO hydrogenation
  • Hydrogen pre-treatment
  • Inelastic neutron scattering

Fingerprint

Dive into the research topics of 'The application of inelastic neutron scattering to investigate a hydrogen pre-treatment stage of an iron Fischer-Tropsch catalyst'. Together they form a unique fingerprint.

Cite this