Visualization of gas flow and diffusion in porous media

L. G. Kaiser; T. Meersmann; J. W. Logan; A. Pines

doi:10.1073/pnas.050012497

Visualization of gas flow and diffusion in porous media

L. G. Kaiser, T. Meersmann, J. W. Logan, A. Pines

Research output: Journal Publication › Article › peer-review

45 Citations (Scopus)

Abstract

The transport of gases in porous materials is a crucial component of many important processes in science and technology. In the present work, we demonstrate how magnetic resonance microscopy with continuous flow laser- polarized noble gases makes it possible to 'light up' and thereby visualize, with unprecedented sensitivity and resolution, the dynamics of gases in samples of silica aerogels and zeolite molecular sieve particles. The 'polarization-weighted' images of gas transport in aerogel fragments are correlated to the diffusion coefficient of xenon obtained from NMR pulsed- field gradient experiments. The technique provides a unique means of studying the combined effects of flow and diffusion in systems with macroscopic dimensions and microscopic internal pore structure.

Original language	English
Pages (from-to)	2414-2418
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	97
Issue number	6
DOIs	https://doi.org/10.1073/pnas.050012497
Publication status	Published - 14 Mar 2000
Externally published	Yes

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AU - Meersmann, T.

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AU - Pines, A.

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N2 - The transport of gases in porous materials is a crucial component of many important processes in science and technology. In the present work, we demonstrate how magnetic resonance microscopy with continuous flow laser- polarized noble gases makes it possible to 'light up' and thereby visualize, with unprecedented sensitivity and resolution, the dynamics of gases in samples of silica aerogels and zeolite molecular sieve particles. The 'polarization-weighted' images of gas transport in aerogel fragments are correlated to the diffusion coefficient of xenon obtained from NMR pulsed- field gradient experiments. The technique provides a unique means of studying the combined effects of flow and diffusion in systems with macroscopic dimensions and microscopic internal pore structure.

AB - The transport of gases in porous materials is a crucial component of many important processes in science and technology. In the present work, we demonstrate how magnetic resonance microscopy with continuous flow laser- polarized noble gases makes it possible to 'light up' and thereby visualize, with unprecedented sensitivity and resolution, the dynamics of gases in samples of silica aerogels and zeolite molecular sieve particles. The 'polarization-weighted' images of gas transport in aerogel fragments are correlated to the diffusion coefficient of xenon obtained from NMR pulsed- field gradient experiments. The technique provides a unique means of studying the combined effects of flow and diffusion in systems with macroscopic dimensions and microscopic internal pore structure.

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Visualization of gas flow and diffusion in porous media

Abstract

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