Unidimensional diffusion of long n-alkanes in nanoporous channels.
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.
Jobic
Hervé
H
Institut de Recherches sur la Catalyse et l'Environnement de Lyon, Universite Lyon 1, CNRS, UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne, France. herve.jobic@ircelyon.univ-lyon1.fr
Farago
Bela
B