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Updated: Jul 19, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
Published on: September 2, 2016
Isotropic concentration profiles during diffusion-limited desorption from anisotropic media
1Institute of Experimental Physics I, University of Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany. pbrauer@physik.uni-leipzig.de
Abstract:
Imaging of the concentration profiles of the diffusants during molecular adsorption on and desorption from porous media is developing to become an important, very specific tool of monitoring the structure of these media. With the present study we refer to the remarkable phenomenon that even in the case of anisotropic porous media the concentration profiles recorded under desorption may attain isotropic patterns, irrespective of the fact that desorption is limited by anisotropic diffusion. The presentation is based on both dynamic Monte Carlo simulations and analytical considerations.
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