Details
| Original language | English |
|---|---|
| Article number | 122677 |
| Number of pages | 10 |
| Journal | Journal of membrane science |
| Volume | 700 |
| Early online date | 19 Mar 2024 |
| Publication status | Published - May 2024 |
Abstract
Defects among the grains of MOF polycrystalline membranes lead to non-selective gas transport, thereby reducing their selectivity in gas separation. In this work, ZIF-62 polycrystalline membranes with a well-intergrown structure were prepared on MXene-modified supports. Subsequent thermal treatment transformed the membranes into glass membranes, effectively eliminating non-selective defects at grain boundaries. Due to the incorporation of the MXene film and the vertical positioning of the support during the solvothermal process, only a minimal portion of the glass melt infiltrated into the porous support. Across the temperature range of 303 K–423 K and pressure range of 1 bar–3 bar, the ZIF-62 glass membranes showcased superior helium separation property and long-term chemical stability (resistant to CO2 and H2O). The helium permeance reached approximately 51 GPU, with selectivities against N2 and CH4 being 17.4 and 13.9, respectively, outperforming current MOF membranes.
Keywords
- Gas separation, Helium recovery, MOF glass, MXene, ZIF-62 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. 700, 122677, 05.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Preparation of ZIF-62 polycrystalline and glass membranes for helium separation
AU - Zhao, Zhijun
AU - Ding, Li
AU - Mundstock, Alexander
AU - Stölting, Oliver
AU - Polarz, Sebastian
AU - Wang, Haihui
AU - Feldhoff, Armin
N1 - Funding Information: This work was financially supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, project number 409987259). The authors thank L. Wagner and Prof. U. Giese for the DSC measurements, Dr. R. Almeev for access to the JSM-7610FPlus scanning electron microscope, and F. Steinbach for the technical assistance during energy-dispersive X-ray experiments.
PY - 2024/5
Y1 - 2024/5
N2 - Defects among the grains of MOF polycrystalline membranes lead to non-selective gas transport, thereby reducing their selectivity in gas separation. In this work, ZIF-62 polycrystalline membranes with a well-intergrown structure were prepared on MXene-modified supports. Subsequent thermal treatment transformed the membranes into glass membranes, effectively eliminating non-selective defects at grain boundaries. Due to the incorporation of the MXene film and the vertical positioning of the support during the solvothermal process, only a minimal portion of the glass melt infiltrated into the porous support. Across the temperature range of 303 K–423 K and pressure range of 1 bar–3 bar, the ZIF-62 glass membranes showcased superior helium separation property and long-term chemical stability (resistant to CO2 and H2O). The helium permeance reached approximately 51 GPU, with selectivities against N2 and CH4 being 17.4 and 13.9, respectively, outperforming current MOF membranes.
AB - Defects among the grains of MOF polycrystalline membranes lead to non-selective gas transport, thereby reducing their selectivity in gas separation. In this work, ZIF-62 polycrystalline membranes with a well-intergrown structure were prepared on MXene-modified supports. Subsequent thermal treatment transformed the membranes into glass membranes, effectively eliminating non-selective defects at grain boundaries. Due to the incorporation of the MXene film and the vertical positioning of the support during the solvothermal process, only a minimal portion of the glass melt infiltrated into the porous support. Across the temperature range of 303 K–423 K and pressure range of 1 bar–3 bar, the ZIF-62 glass membranes showcased superior helium separation property and long-term chemical stability (resistant to CO2 and H2O). The helium permeance reached approximately 51 GPU, with selectivities against N2 and CH4 being 17.4 and 13.9, respectively, outperforming current MOF membranes.
KW - Gas separation
KW - Helium recovery
KW - MOF glass
KW - MXene
KW - ZIF-62 membrane
UR - http://www.scopus.com/inward/record.url?scp=85188706894&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2024.122677
DO - 10.1016/j.memsci.2024.122677
M3 - Article
AN - SCOPUS:85188706894
VL - 700
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
M1 - 122677
ER -