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Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging

Mousa, Suleiman; Novak, Vladimir; Fletcher, Robin S.; Kelly, Gordon; Garcia, Monica; Macleod, Norman; Parmenter, Christopher; Rigby, Sean P.

Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging Thumbnail


Authors

Suleiman Mousa

Vladimir Novak

Robin S. Fletcher

Gordon Kelly

Monica Garcia

Norman Macleod

SEAN RIGBY sean.rigby@nottingham.ac.uk
Professor of Chemical Engineering



Abstract

Catalyst pellet fabrication parameters significantly impact final product performance. Tabletted pellets are complex, hierarchical structures that evolve differently over various levels during subsequent processing. Multi-scale porosimetry and multi-modal imaging can, together, encompass all length-scales involved, and, therefore, fully characterise the evolving pellet structure during catalyst reduction and sintering. A random pore-bond network model has highlighted the key pellet structural features determining mass transport, and, thence, was predictive of the impact on mass transfer of controlled modifications to the void space for reduced and aged catalysts. Particular macroporosity, newly induced by reduction and sintering, was critical to mass transport out of proportion to its pore volume fraction. Combined X-ray tomography imaging and percolation modelling showed that reduction and sintering leads to a change (compared to the fresh state) in the initial pellet fabrication parameter that controls mass transport in pellets formed with roll-compacted feed.

Citation

Mousa, S., Novak, V., Fletcher, R. S., Kelly, G., Garcia, M., Macleod, N., …Rigby, S. P. (2023). Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging. Chemical Engineering Science, 277, Article 118880. https://doi.org/10.1016/j.ces.2023.118880

Journal Article Type Article
Acceptance Date May 11, 2023
Online Publication Date May 17, 2023
Publication Date Aug 5, 2023
Deposit Date May 25, 2023
Publicly Available Date May 25, 2023
Journal Chemical Engineering Science
Print ISSN 0009-2509
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 277
Article Number 118880
DOI https://doi.org/10.1016/j.ces.2023.118880
Keywords Applied Mathematics; Industrial and Manufacturing Engineering; General Chemical Engineering; General Chemistry
Public URL https://nottingham-repository.worktribe.com/output/21107442
Publisher URL https://www.sciencedirect.com/science/article/pii/S0009250923004360

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