Positron emission profiling study of the diffusion of 3-methylpentane in silicalite-1

The influence of the loading on the self-diffusion of 3-methylpentane within silicalite-1 was studied with positron emission profiling technique. A monotonous decrease in the self-diffusivities of alkane was obsd. with zeolite loading, which could be approximated by a stretched exponential. As a consequence, the apparent activation energy increases with partial pressure