High-performance porous carbon-zeolite mixed-matrix membranes for CO2/N-2 separation

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Nano-sized PS-MFI, ETS-10 and SAPO-34 zeolites were utilized as CO2 -selective fillers to fabricate high-performance mixed-matrix carbon molecular sieve membranes (CMSMs) for application in the CO2/N-2 separation process. In this work, an in-house polyimide, ODPA-TMPDA, was used as a polymer precursor for CMSMs, due to its higher intrinsic gas permeability compared with commercial polyimides. Zeolite-filled CMSMs were then successfully fabricated without any appreciable defects at the filler/matrix interfaces. Gas permeation testing revealed that both CO2 permeability and CO2/N-2 selectivity can be significantly improved upon incorporation of such zeolite fillers, enabling selective adsorption and transport of CO2. In particular, SAPO-34 yielded the best results among the zeolite fillers tested, resulting in an excellent performance far beyond the Robeson upper bound limit for CO2/N-2 separation.
Publisher
ELSEVIER
Issue Date
2021-03
Language
English
Article Type
Article
Citation

JOURNAL OF MEMBRANE SCIENCE, v.622

ISSN
0376-7388
DOI
10.1016/j.memsci.2020.119031
URI
http://hdl.handle.net/10203/281583
Appears in Collection
CBE-Journal Papers(저널논문)
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