Water diffusion in zeolite 4Abeds measured by broad-line magnetic resonance imaging
- 1 May 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 51 (17) , 11332-11338
- https://doi.org/10.1103/physrevb.51.11332
Abstract
Broad-line magnetic resonance imaging has been used to monitor water transport in beds of industrial grade zeolite 4A. Diffusion profiles as a function of time have been obtained for a series of temperatures in the range 20–70 °C. The dynamics is observed to be strongly non-Fickian. A model based on coupled diffusion equations for the vapor in the interparticle space and water within the particles has been developed and shown to be in good agreement with experiment. Values for the intraparticle water diffusion coefficient and the interparticle vapor diffusion coefficient, which can be obtained from the model, and their respective temperature dependencies are in good agreement with other published results.Keywords
This publication has 12 references indexed in Scilit:
- NMR studies of molecular mobility and diffusion in porous systemsMagnetic Resonance Imaging, 1994
- A repetitive pulse variant of broadline gradient echo magnetic resonance imagingMeasurement Science and Technology, 1993
- Space- and Time-Resolved PFG NMR Self-Diffusion Measurements in ZeolitesJournal of Magnetic Resonance, Series A, 1993
- NMR imaging of solids using large oscillating field gradientsMeasurement Science and Technology, 1990
- N.m.r. self-diffusion studies in zeolite science and technologyZeolites, 1987
- NMR Study of the Influence of a Carrier Gas on Zeolitic DiffusionZeitschrift für Physikalische Chemie, 1984
- Surface phenomena investigated by nuclear magnetic resonancePhysics Reports, 1976
- On the correlation between diffusion and self-diffusion processes of adsorbed molecules in a simple microkinetic modelSurface Science, 1976
- Diffiisionsuntersuchung von Wasser an 13X- sowie an 4A- und 5A-Zeolithen mit Hilfe der Methode der gepulsten FeldgradientenZeitschrift für Physikalische Chemie, 1971
- Measurement of diffusion and thermal conductivity "constants" in non-homogeneous media, and in media where these "constants" depend respectively on concentration or temperatureProceedings of the Physical Society, 1946