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Highly permeable mixed matrix materials comprising ZIF-8 nanoparticles in rubbery amorphous poly(ethylene oxide) for CO2 capture.
- Source :
-
Separation & Purification Technology . Oct2018, Vol. 205, p58-65. 8p. - Publication Year :
- 2018
-
Abstract
- Amorphous polymers containing poly(ethylene oxide) are leading membrane materials for CO 2 capture from fossil fuel-derived flue gas and syngas, such as those prepared from poly(ethylene glycol) diacrylate (PEGDA) and poly(ethylene glycol) methyl ether acrylate (PEGMEA). This work shows that introduction of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles in these polymers increases CO 2 permeability with minimal effect on CO 2 /H 2 and CO 2 /N 2 selectivity. Specifically, ZIF-8 nanoparticles with a size of 150–250 nm were synthesized and fabricated into mixed matrix materials (MMMs). The effect of ZIF-8 loading on gas transport properties at 35 °C in MMMs was systematically investigated. Adding 10 wt% ZIF-8 in the crosslinked PEGDA increases CO 2 permeability from 130 Barrers to 320 Barrers unexpectedly by 170% without any reduction of CO 2 /light gas selectivity. While the CO 2 /light gas selectivity in the MMMs can be satisfactorily described using the Lewis-Nielsen model, the model underestimates the gas permeability. Despite a body of studies of MMMs comprising ZIFs, this work represents one of the few on the MMMs based on amorphous rubbery polymers elucidating the effect of ZIF-8 loading on the polymer properties and demonstrating their impact in achieving superior CO 2 /H 2 and CO 2 /N 2 separation properties. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOPARTICLES
*ZEOLITES
*POLYETHYLENE oxide
*CARBON sequestration
*FOSSIL fuels
Subjects
Details
- Language :
- English
- ISSN :
- 13835866
- Volume :
- 205
- Database :
- Academic Search Index
- Journal :
- Separation & Purification Technology
- Publication Type :
- Academic Journal
- Accession number :
- 130689143
- Full Text :
- https://doi.org/10.1016/j.seppur.2018.05.012