The transport properties of an A-type zeolite membrane are traced by monitoring the diffusion paths of ethane and propane from ca. 300 nm up to 10 µm; over distances < 1 µm, the diffusivities are found to be comparable with those in a mono-crystal, while for large displacements by a factor of two to three smaller diffusivities were observed.
W. Heink, J. Kärger, U. Winkler and T. Naylor, Chem. Commun., 1999, 57 DOI: 10.1039/A807733I
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