Bux, Helge ; Chmelik, Christian ; Krishna, Rajamani ; Caro, Juergen (2011) Ethene/ethane separation by the MOF membrane ZIF-8: molecular correlation of permeation, adsorption, diffusion Journal of Membrane Science, 369 (1-2). pp. 284-289. ISSN 0376-7388
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.memsci.2010.12.001
Abstract
The newly developed MOF membrane ZIF-8 separates an equimolar ethene/ethane mixture at room temperature for 1 and 6 bar feed pressure, respectively, with a selectivity of 2.8 and 2.4. Independent sorption uptake studies of an ethene/ethane mixture on a big ZIF-8 single crystal by IR microscopy detection show in combination with grand canonical Monte Carlo simulations that this moderate ethene selectivity of the ZIF-8 membrane can be explained by the interplay of a preferential ethane adsorption selectivity competing with a preferential ethene diffusion selectivity. This means, that ethane adsorbs stronger than ethene, but ethene diffuses faster and overcompensates the adsorption preference of ethane, resulting in a membrane permeation selectivity for ethene.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | MOF Membrane; ZIF-8 Membrane; Ethene/Ethane Separation; IR Microscopy; GCMC Simulations |
| ID Code: | 65309 |
| Deposited On: | 17 Oct 2011 03:33 |
| Last Modified: | 17 Oct 2011 03:33 |
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