NMR Imaging of low pressure, gas-phase transport in packed beds using hyperpolarized xenon-129

Pavlovskaya, Galina E. and Six, Joseph S. and Meersman, Thomas and Gopinathan, Navin and Rigby, Sean P. (2015) NMR Imaging of low pressure, gas-phase transport in packed beds using hyperpolarized xenon-129. AIChE Journal, 61 (11). pp. 4013-4016. ISSN 1547-5905

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Abstract

Gas-phase magnetic resonance imaging (MRI) has been used to investigate heterogeneity in mass transport in a packed bed of commercial, alumina, catalyst supports. Hyperpolarized 129Xe MRI enables study of transient diffusion for micro- scopic porous systems using xenon chemical shift to selectively image gas within the pores, and, thence, permits study of low-density, gas-phase mass-transport, such that diffusion can be studied in the Knudsen regime, and not just the molecular regime, which is the limitation with other current techniques. Knudsen-regime diffusion is common in many industrial, catalytic processes. Significantly, larger spatial variability in mass transport rates across the packed bed was found compared to techniques using only molecular diffusion. It has thus been found that that these heterogeneities arise over length-scales much larger than

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Pavlovskaya, G., Six, Joseph S., Meersman, T., Gopinathan, N., Rigby, S. (2015) NMR Imaging of low pressure, gas-phase transport in packed beds using hyperpolarized xenon-129. AIChE Journal 61(11) 4013-4016, which has been published in final form at http://dx.doi.org/10.1002/aic.14929. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: gas-phase magnetic resonance imaging, hyperpolarized xenon, Knudsen diffusion, catalyst support
Schools/Departments: University of Nottingham UK Campus > Faculty of Medicine and Health Sciences > School of Medicine > Division of Respiratory Medicine
Identification Number: https://doi.org/10.1002/aic.14929
Depositing User: Pavlovskaya, Galina
Date Deposited: 05 Feb 2016 08:18
Last Modified: 15 Sep 2016 01:55
URI: http://eprints.nottingham.ac.uk/id/eprint/31530

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