Отправлено: 27.08.08 03:33. Заголовок: The Potentials of Pulsed Field Gradient NMR for Investigation of Porous Media

The Potentials of Pulsed Field Gradient NMR for Investigation of Porous Media
Adsorption
Springer Netherlands
ISSN 0929-5607 (Print) 1572-8757 (Online)
Volume 5, Number 2 / Март 1999 г.
DOI 10.1023/A:1008949607093
pp. 117-133

The Potentials of Pulsed Field Gradient NMR for Investigation of Porous Media
Frank Stallmach1 and Jörg Kärger1
(1) Fakultät für Physik und Geowissenschaften, Universität Leipzig, Linnéstraße 5, 04103 Leipzig, Germany

Abstract PFG NMR self-diffusion studies provide information on the translational mobility of fluid molecules. Since in porous media the diffusion path of fluid molecules in the pore space is affected by interaction with the pore wall, PFG NMR measurements are sensitive to structural peculiarities of the confining porous medium. The pore space properties which can be investigated depend on length scales set by the PFG NMR experiment in respect to the typical size of the structural feature studied. Based upon these length scales, an interpretation pattern for PFG NMR self-diffusion studies in porous media is given. PFG NMR self-diffusion studies in macro- and microporous systems such as sedimentary rocks and zeolite crystallites, respectively, are reviewed.
nuclear magnetic resonance - self-diffusion - pore structure - zeolite - sedimentary rock


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