Journal
CHEMIE INGENIEUR TECHNIK
Volume 83, Issue 1-2, Pages 104-112Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cite.201000179
Keywords
1-Butene/i-butene separation; CO2/CH4 separation; Ethene/ethane separation; ZIF-8 membrane; ZSM-5 membrane
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Funding
- DFG [1362]
- BASF SE
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In three case studies, (i) 1-butene/i-butene separation on a ZSM-5 membrane, (ii) carbon dioxide/methane, and (iii) ethene/ethane separations on a zeolitic imidazolate framework 8 (ZIF-8) type metal organic framework (MOF) membrane, it is demonstrated that the membrane selectivity for the separation of a gas mixtures can be well described and even predicted by the interplay of mixture adsorption and mixture diffusion according to the simple relation membrane selectivity = adsorption selectivity x diffusion selectivity. The mixed gas adsorption and diffusion data which are necessary for the above calculation can be derived cost and time effective by sorption uptake/desorption studies on giant single crystals with IR microscopy (IRM) detection.
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