Wilfried Heink, Jörg Kärger, Ulf Winkler and Tim Naylor
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.