Single gas permeation of thin zeolite (MFI) membranes: theory and analysis of experimental observations
| Autor: | A.J. Burggraaf |
|---|---|
| Přispěvatelé: | Inorganic Materials Science |
| Rok vydání: | 1999 |
| Předmět: |
Surface diffusion
Chemistry Diffusion Microporous and porous membranes Thermodynamics Filtration and Separation Gas and vapour permeation Permeation Kinetic energy Molecular sieve Biochemistry Membrane Mass transfer Physical chemistry Theory General Materials Science Physical and Theoretical Chemistry Zeolite |
| Zdroj: | Journal of membrane science, 155(1), 45-65. Elsevier |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/s0376-7388(98)00295-6 |
| Popis: | Theoretical expressions for single gas permeation are analysed and evaluated with selected literature and some new experimental data on Silicalite/ZSM-5 membranes. The phenomenological sorption–diffusion (PSD) description (and its equivalent Maxwell–Stefan equation) covers both the microscopic models based on configurational diffusion (CD) with δ=1.0 and on surface diffusion (SD) with δ≥1.24. The ratio δ of the pore diameter over the (kinetic) molecular diameter is important. For 1.24≤δAr>Kr>Xe at given values of δ close to unity is predicted by the SEMP model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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