Details
| Original language | English |
|---|---|
| Pages (from-to) | 210-215 |
| Number of pages | 6 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 189 |
| Early online date | 21 Sept 2013 |
| Publication status | Published - 1 May 2014 |
Abstract
We studied the separation of four practice-relevant gas mixtures on three different membranes which were prepared on porous alumina supports: (i) a pure ZIF-8 (zeolitic imidazolate framework), (ii) a pure PMPS (polymethylphenylsiloxane) polymer, and (iii) a mixed matrix membrane (MMM, with 8.3 wt.% ≈ 8.8 vol.% ZIF-8 (density 0.93 g cm-3) in PMPS (density 1.00 g cm-3)). The four gas mixtures under study were: CO 2/CH4, CO2/N2, H2/CO 2, and O2/N2. Whereas the pure ZIF-8 membrane shows the best separation factor α = 11 for H2/CH4, the pure PMPS membrane has higher separation factors for the CO2 separation from other gases. It was anticipated that the separation behavior of the MMM results from an interplay of the permeation through the PMPS polymer matrix and the embedded ZIF-8 nanocrystals. Actually, the separation factors of the MMM were found to be equal to the separation factors of the pure polymer membrane. However, we measured much higher gas fluxes through the MMM than through the pure polymer membrane. This experimental finding could indicate an increase of the free volume of the PMPS polymer after introduction of ZIF-8 nanoparticles.
Keywords
- Increased free volume, Mixed matrix membrane, Permeation, PMPS membrane, ZIF-8 membrane
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 189, 01.05.2014, p. 210-215.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Comparative permeation studies on three supported membranes
T2 - Pure ZIF-8, pure polymethylphenylsiloxane, and mixed matrix membranes
AU - Diestel, L.
AU - Liu, X. L.
AU - Li, Y. S.
AU - Yang, W. S.
AU - Caro, J.
PY - 2014/5/1
Y1 - 2014/5/1
N2 - We studied the separation of four practice-relevant gas mixtures on three different membranes which were prepared on porous alumina supports: (i) a pure ZIF-8 (zeolitic imidazolate framework), (ii) a pure PMPS (polymethylphenylsiloxane) polymer, and (iii) a mixed matrix membrane (MMM, with 8.3 wt.% ≈ 8.8 vol.% ZIF-8 (density 0.93 g cm-3) in PMPS (density 1.00 g cm-3)). The four gas mixtures under study were: CO 2/CH4, CO2/N2, H2/CO 2, and O2/N2. Whereas the pure ZIF-8 membrane shows the best separation factor α = 11 for H2/CH4, the pure PMPS membrane has higher separation factors for the CO2 separation from other gases. It was anticipated that the separation behavior of the MMM results from an interplay of the permeation through the PMPS polymer matrix and the embedded ZIF-8 nanocrystals. Actually, the separation factors of the MMM were found to be equal to the separation factors of the pure polymer membrane. However, we measured much higher gas fluxes through the MMM than through the pure polymer membrane. This experimental finding could indicate an increase of the free volume of the PMPS polymer after introduction of ZIF-8 nanoparticles.
AB - We studied the separation of four practice-relevant gas mixtures on three different membranes which were prepared on porous alumina supports: (i) a pure ZIF-8 (zeolitic imidazolate framework), (ii) a pure PMPS (polymethylphenylsiloxane) polymer, and (iii) a mixed matrix membrane (MMM, with 8.3 wt.% ≈ 8.8 vol.% ZIF-8 (density 0.93 g cm-3) in PMPS (density 1.00 g cm-3)). The four gas mixtures under study were: CO 2/CH4, CO2/N2, H2/CO 2, and O2/N2. Whereas the pure ZIF-8 membrane shows the best separation factor α = 11 for H2/CH4, the pure PMPS membrane has higher separation factors for the CO2 separation from other gases. It was anticipated that the separation behavior of the MMM results from an interplay of the permeation through the PMPS polymer matrix and the embedded ZIF-8 nanocrystals. Actually, the separation factors of the MMM were found to be equal to the separation factors of the pure polymer membrane. However, we measured much higher gas fluxes through the MMM than through the pure polymer membrane. This experimental finding could indicate an increase of the free volume of the PMPS polymer after introduction of ZIF-8 nanoparticles.
KW - Increased free volume
KW - Mixed matrix membrane
KW - Permeation
KW - PMPS membrane
KW - ZIF-8 membrane
UR - http://www.scopus.com/inward/record.url?scp=84896143106&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2013.09.012
DO - 10.1016/j.micromeso.2013.09.012
M3 - Article
AN - SCOPUS:84896143106
VL - 189
SP - 210
EP - 215
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -