Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 288-293 |
| Seitenumfang | 6 |
| Fachzeitschrift | Microporous and Mesoporous Materials |
| Jahrgang | 164 |
| Frühes Online-Datum | 28 Juli 2012 |
| Publikationsstatus | Veröffentlicht - 1 Dez. 2012 |
Abstract
The metal-organic framework (MOF) ZIF-8 (ZIF-8 = zeolitic imidazolate framework-8) was evaluated as molecular sieve membrane in the pervaporation of the two liquid mixtures n-hexane/benzene and n-hexane/mesitylene. Though it is known from permeation studies of light gases that ZIF-8 membranes show no sharp separation cut-off at the estimated crystallographic pore size of 3.4 Å, highly branched or aromatic hydrocarbons > C 5 could be expected therefore to become rejected by the ZIF-8 pores thus remaining in the retentate. However, the ZIF-8 membrane shows for n-hexane and benzene remarkable fluxes. Under consideration of the leakage of the apparatus, we can state that n-hexane and benzene can pass the ZIF-8 membrane. Benzene had a lower flux than n-hexane, whereas for mesitylene we could only observe a very small leakage rate through the O-ring gasket. Correspondingly, medium mixture separation factors have been found for the pervaporation separation of a liquid n-hexane/benzene mixture. Additional mixed gas hydrogen/methane separations, adsorption experiments and leak rate measurements were carried out to evaluate the results.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Werkstoffwissenschaften (insg.)
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Werkstoffmechanik
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in: Microporous and Mesoporous Materials, Jahrgang 164, 01.12.2012, S. 288-293.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Pervaporation studies of n-hexane, benzene, mesitylene and their mixtures on zeolitic imidazolate framework-8 membranes
AU - Diestel, Lisa
AU - Bux, Helge
AU - Wachsmuth, Dennis
AU - Caro, Jürgen
PY - 2012/12/1
Y1 - 2012/12/1
N2 - The metal-organic framework (MOF) ZIF-8 (ZIF-8 = zeolitic imidazolate framework-8) was evaluated as molecular sieve membrane in the pervaporation of the two liquid mixtures n-hexane/benzene and n-hexane/mesitylene. Though it is known from permeation studies of light gases that ZIF-8 membranes show no sharp separation cut-off at the estimated crystallographic pore size of 3.4 Å, highly branched or aromatic hydrocarbons > C 5 could be expected therefore to become rejected by the ZIF-8 pores thus remaining in the retentate. However, the ZIF-8 membrane shows for n-hexane and benzene remarkable fluxes. Under consideration of the leakage of the apparatus, we can state that n-hexane and benzene can pass the ZIF-8 membrane. Benzene had a lower flux than n-hexane, whereas for mesitylene we could only observe a very small leakage rate through the O-ring gasket. Correspondingly, medium mixture separation factors have been found for the pervaporation separation of a liquid n-hexane/benzene mixture. Additional mixed gas hydrogen/methane separations, adsorption experiments and leak rate measurements were carried out to evaluate the results.
AB - The metal-organic framework (MOF) ZIF-8 (ZIF-8 = zeolitic imidazolate framework-8) was evaluated as molecular sieve membrane in the pervaporation of the two liquid mixtures n-hexane/benzene and n-hexane/mesitylene. Though it is known from permeation studies of light gases that ZIF-8 membranes show no sharp separation cut-off at the estimated crystallographic pore size of 3.4 Å, highly branched or aromatic hydrocarbons > C 5 could be expected therefore to become rejected by the ZIF-8 pores thus remaining in the retentate. However, the ZIF-8 membrane shows for n-hexane and benzene remarkable fluxes. Under consideration of the leakage of the apparatus, we can state that n-hexane and benzene can pass the ZIF-8 membrane. Benzene had a lower flux than n-hexane, whereas for mesitylene we could only observe a very small leakage rate through the O-ring gasket. Correspondingly, medium mixture separation factors have been found for the pervaporation separation of a liquid n-hexane/benzene mixture. Additional mixed gas hydrogen/methane separations, adsorption experiments and leak rate measurements were carried out to evaluate the results.
KW - Breathing
KW - Gate opening
KW - Pervaporation
KW - ZIF-8 membrane
UR - http://www.scopus.com/inward/record.url?scp=84867403619&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2012.06.031
DO - 10.1016/j.micromeso.2012.06.031
M3 - Article
AN - SCOPUS:84867403619
VL - 164
SP - 288
EP - 293
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -