Hydrogen partitioning as a function of time-on-stream for an un-promoted iron-based Fischer-Tropsch synthesis catalyst applied to CO hydrogenation

Lennon, D. , Davidson, A., Webb, P. B., Parker, S. F. and Lennon, D. (2020) Hydrogen partitioning as a function of time-on-stream for an un-promoted iron-based Fischer-Tropsch synthesis catalyst applied to CO hydrogenation. Industrial and Engineering Chemistry Research, 59(1), pp. 52-60. (doi: 10.1021/acs.iecr.9b04636)

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Abstract

Inelastic neutron scattering (INS) is employed to examine the evolution of a promoter-free iron-based Fischer-Tropsch synthesis (FTS) catalyst ( 10 g catalyst charge) that is exposed to ambient pressure CO hydrogenation at 623 K for up to 10 days time-on-stream (T-o-S). The longer reaction time is selected to better understand how the formation of a previously described hydrocarbonaceous overlayer corresponds to the catalyst conditioning process. Whereas the onset of pseudo steady-state reactor performance is observed at approximately 9 h T-o-S, INS establishes that the intensity of the C-H stretching mode of the sp3 hybridised component of the hydrocarbonaceous overlayer saturates at about 24 h T-o-S, whilst the corresponding intensity of the C-H stretching mode of the sp2 hybridised component requires 100-200 h T-o-S to achieve saturation. This novel series of measurements reveal different aspects of the complex catalyst evolutionary process to be indirectly connected with catalytic turnover.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Davidson, Dr Alisha and Lennon, Professor David
Authors: Lennon, D., Davidson, A., Webb, P. B., Parker, S. F., and Lennon, D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Industrial and Engineering Chemistry Research
Publisher:American Chemical Society
ISSN:0888-5885
ISSN (Online):0888-5885
Published Online:09 December 2019
Copyright Holders:Copyright © 2019 American Chemical Society
First Published:First published in Industrial and Engineering Chemistry Research 59(1):52-60
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
190262EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering and Physical Sciences Research Council (EPSRC)EP/P505534/1Research and Innovation Services