Diffusion of aromatic hydrocarbons in silicalite/HZSM-5 |
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Authors: | Douglas M Ruthven |
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Institution: | (1) Department of Chemical Engineering, University of Maine, Orono, ME 04469, USA |
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Abstract: | Diffusion of benzene and the xylene isomers in silicalite/HZSM-5 has been studied by a wide range of different experimental
techniques. The available data are reviewed in an attempt to draw general conclusions concerning the intracrystalline diffusion
process. The results for benzene are remarkably consistent, and the conformity between transport and tracer diffusion and
between single crystal membrane and ZLC and frequency response data suggests that diffusion is essentially isotropic with
no significant difference between the self and “corrected” transport diffusivity. The situation is more complex for p-xylene
which shows clear evidence of non-isotropic behavior and a significant difference between tracer and transport diffusivities. |
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