Davidson, A. L., Webb, P. B., Parker, S. F. and Lennon, D. (2021) An inelastic neutron scattering investigation of the temporal behaviour of the hydrocarbonaceous overlayer of a prototype Fischer-Tropsch to olefins catalyst. Topics in Catalysis, 64(9-12), pp. 631-637. (doi: 10.1007/s11244-021-01419-y)
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Abstract
A dual sodium and sulfur promoted haematite, representative of a candidate Fischer-Tropsch to olefins (FTO) catalyst, is prepared and contrasted with the performance of an unpromoted hematite sample in the ambient pressure CO hydrogenation reaction at 623 K as a function of time-on-stream (0–24 h). In-situ post-reaction temperature-programmed oxidation measurements show the carbon evolutionary phase of the catalyst conditioning process to be retarded for the FTO catalyst. Ex-situ inelastic neutron scattering measurements show the promoters perturb the formation of a previously described hydrocarbonaceous overlayer. Specifically, whilst the sp3 hybridised C–H modes of the hydrocarbonaceous overlayer are almost unaffected by the additives, the formation of the overlayer’s sp2 hybridised C–H modes are noticeably impeded. The results are discussed in terms of the Na/S promoters disturbing the formation of an ordered hydrocarbonaceous overlayer that is thought to constrain the supply of adsorbed hydrogen atoms, which favours the formation of unsaturated hydrocarbons associated with the FTO process.
Item Type: | Articles |
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Additional Information: | Sasol Ltd., the University of Glasgow and the EPSRC [award reference EP/P505534/1.] are thanked for the provision of a postgraduate studentship (ALD). The Royal Society is thanked for the provision of an Industry Fellowship (PBW). |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Davidson, Dr Alisha and Lennon, Professor David |
Authors: | Davidson, A. L., Webb, P. B., Parker, S. F., and Lennon, D. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Topics in Catalysis |
Publisher: | Springer |
ISSN: | 1022-5528 |
ISSN (Online): | 1572-9028 |
Published Online: | 17 March 2021 |
Copyright Holders: | Copyright © 2021 The Authors |
First Published: | First published in Topics in Catalysis 64(9-12): 631-637 |
Publisher Policy: | Reproduced under a Creative Commons License |
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