Abstract
The diffusion of long n-alkanes confined in silicalite zeolite has been studied with the neutron spin-echo technique. Since only isotropic diffusion has been measured so far with this technique, we derive the intermediate scattering functions for one-dimensional (1D) and single-file diffusion. The 1D diffusion model explains the results obtained for long n-alkanes in the intersecting channel system of silicalite. A redistribution of the molecules is observed at high temperatures, supporting the presence of internal barriers within the zeolite crystals.
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