Magnetic resonance imaging of chemical waves in porous media
Magnetic resonance imaging of chemical waves in porous media
Magnetic resonance imaging (MRI) provides a powerful tool for the investigation of chemical structures in optically opaque porous media, in which chemical concentration gradients can be visualized, and diffusion and flow properties are simultaneously determined. In this paper we give an overview of the MRI technique and review theory and experiments on the formation of chemical waves in a tubular packed bed reactor upon the addition of a nonlinear chemical reaction. MR images are presented of reaction-diffusion waves propagating in the three-dimensional (3D) network of channels in the reactor, and the 3D structure of stationary concentration patterns formed via the flow-distributed oscillation mechanism is demonstrated to reflect the local hydrodynamics in the packed bed. Possible future directions regarding the influence of heterogeneities on transport and reaction are discussed.
Taylor, A.F.
08028a29-428d-4732-b6b1-f7a93389b386
Britton, M.M.
29f41f3f-7b7e-4c9f-8126-875cc9373bc3
27 September 2006
Taylor, A.F.
08028a29-428d-4732-b6b1-f7a93389b386
Britton, M.M.
29f41f3f-7b7e-4c9f-8126-875cc9373bc3
Taylor, A.F. and Britton, M.M.
(2006)
Magnetic resonance imaging of chemical waves in porous media.
Chaos, 16 (3).
(doi:10.1063/1.2228129).
Abstract
Magnetic resonance imaging (MRI) provides a powerful tool for the investigation of chemical structures in optically opaque porous media, in which chemical concentration gradients can be visualized, and diffusion and flow properties are simultaneously determined. In this paper we give an overview of the MRI technique and review theory and experiments on the formation of chemical waves in a tubular packed bed reactor upon the addition of a nonlinear chemical reaction. MR images are presented of reaction-diffusion waves propagating in the three-dimensional (3D) network of channels in the reactor, and the 3D structure of stationary concentration patterns formed via the flow-distributed oscillation mechanism is demonstrated to reflect the local hydrodynamics in the packed bed. Possible future directions regarding the influence of heterogeneities on transport and reaction are discussed.
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Published date: 27 September 2006
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Local EPrints ID: 499556
URI: http://eprints.soton.ac.uk/id/eprint/499556
ISSN: 1054-1500
PURE UUID: 7af70369-7aa0-492c-abb6-f726b56a83b1
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Date deposited: 25 Mar 2025 18:17
Last modified: 26 Mar 2025 03:14
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Author:
A.F. Taylor
Author:
M.M. Britton
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