Nanostructural Analysis of Co‐Re/γ‐Al <sub>2</sub> O <sub>3</sub> Fischer‐Tropsch Catalyst by TEM and XRD
Authors
Dehghan‐Niri, Roya
Tsakoumis, Nikolaos E
Voronov, Alexey
Holmen, Anders
Holmestad, Randi
Vullum, Per‐Erik
Borg, Øyvind
Rytter, Erling
Rønning, Magnus
Publication Date
2022-06-08Journal Title
ChemCatChem
ISSN
1867-3880
Publisher
Wiley
Language
en
Type
Article
This Version
AO
VoR
Metadata
Show full item recordCitation
Dehghan‐Niri, R., Tsakoumis, N. E., Voronov, A., Holmen, A., Holmestad, R., Vullum, P., Borg, Ø., et al. (2022). Nanostructural Analysis of Co‐Re/γ‐Al
<sub>2</sub>
O
<sub>3</sub>
Fischer‐Tropsch Catalyst by TEM and XRD. ChemCatChem https://doi.org/10.1002/cctc.202101931
Description
Funder: inGAP centre of research-based innovation
Abstract
Abstract: A rhenium promoted Fischer‐Tropsch (FT) cobalt catalyst supported on γ‐Al2O3 has been investigated by Transmission Electron Microscopy (TEM) and X‐ray Diffraction (XRD), before and after reduction. Electron diffraction, High Resolution TEM and Electron Energy Loss Spectroscopy were used to confirm the oxidation state. Cobalt aggregate, particle and crystallite sizes have been studied in detail and measured by TEM and XRD. A cobalt particle size of 10.0±2.4 nm obtained from bright field TEM images for the reduced material is consistent with the XRD analysis of the calcined catalyst. After reduction dark field TEM imaging gave a volume‐weighted crystallite size of 7.5±2.5 nm, which is close to the value obtained by XRD. The particles had lost the parallel orientation and physical continuity within the alumina pore structure that were present before reduction. The latter was confirmed by electron tomography. Lamellae identified with the presence of Hexagonal Close Packed cobalt were observed in the predominantly Face Centred Cubic particles.
Keywords
Research Article, Research Articles, Cobalt catalyst, Fischer-Tropsch, Reduction, Transmission electron microscopy, X-ray diffraction
Sponsorship
Research council of Norway and Equinor (0169673/S10)
Norwegian research council (174893)
NTNU (01-01-850)
Identifiers
cctc202101931
External DOI: https://doi.org/10.1002/cctc.202101931
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336859
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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