Details
| Original language | English |
|---|---|
| Pages (from-to) | 284-289 |
| Number of pages | 6 |
| Journal | Journal of membrane science |
| Volume | 369 |
| Issue number | 1-2 |
| Early online date | 8 Dec 2010 |
| Publication status | E-pub ahead of print - 8 Dec 2010 |
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.
Keywords
- Ethene/ethane separation, GCMC simulations, IR microscopy, MOF membrane, ZIF-8 membrane
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Materials Science(all)
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Filtration and Separation
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In: Journal of membrane science, Vol. 369, No. 1-2, 08.12.2010, p. 284-289.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ethene/ethane separation by the MOF membrane ZIF-8
T2 - Molecular correlation of permeation, adsorption, diffusion
AU - Bux, Helge
AU - Chmelik, Christian
AU - Krishna, Rajamani
AU - Caro, Juergen
PY - 2010/12/8
Y1 - 2010/12/8
N2 - 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.
AB - 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.
KW - Ethene/ethane separation
KW - GCMC simulations
KW - IR microscopy
KW - MOF membrane
KW - ZIF-8 membrane
UR - http://www.scopus.com/inward/record.url?scp=79251605978&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2010.12.001
DO - 10.1016/j.memsci.2010.12.001
M3 - Article
AN - SCOPUS:79251605978
VL - 369
SP - 284
EP - 289
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
IS - 1-2
ER -