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Title: Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation

Abstract

Cross-linked amorphous poly(ethylene oxide) (XLPEO) is one of the leading membrane materials for post-combustion CO2 capture. For example, XLPEO prepared from poly(ethylene glycol) methyl ether acrylate (PEGMEA) exhibited CO2 permeability of 570 Barrer and CO2/N2 selectivity of 41 at 35 °C. However, these XLPEOs cannot be dissolved in coating solutions, making it impossible to be fabricated into thin-film composite (TFC) membranes using state-of-the-art manufacturing processes. In this study, we synthesized high molecular weight yet soluble HPEO via atom transfer radical polymerization (ATRP). These polymers were thoroughly characterized and compared with XLPEO, including thermal transitions, free volumes, and pure-gas sorption and permeation properties. A polymer with the best combination of CO2 permeability (540 Barrer) and CO2/N2 selectivity (43) was fabricated into defect-free TFC membranes with a thickness as thin as 506 ± 44 nm. When challenged with simulated flue gas containing water vapor at 35 °C for over 100 h, the membrane shows stable CO2 permeance of 850 GPU and CO2/N2 selectivity of 37, comparable to the leading commercial membranes for carbon capture.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. State Univ. of New York at Buffalo, NY (United States)
  2. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
State Univ. of New York at Buffalo, NY (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); National Science Foundation (NSF)
OSTI Identifier:
1865821
Alternate Identifier(s):
OSTI ID: 1837114
Grant/Contract Number:  
FE0031736; NSF-1554236
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Membrane Science
Additional Journal Information:
Journal Volume: 644; Journal ID: ISSN 0376-7388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; Poly(ethylene oxide); CO2/N2 separation; thin-film composite membrane; post-combustion carbon capture; atom transfer radical polymerization

Citation Formats

Zhang, Gengyi, Tran, Thien N., Huang, Liang, Deng, Erda, Blevins, Adrienne, Guo, Wenji, Ding, Yifu, and Lin, Haiqing. Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation. United States: N. p., 2021. Web. doi:10.1016/j.memsci.2021.120184.
Zhang, Gengyi, Tran, Thien N., Huang, Liang, Deng, Erda, Blevins, Adrienne, Guo, Wenji, Ding, Yifu, & Lin, Haiqing. Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation. United States. https://doi.org/10.1016/j.memsci.2021.120184
Zhang, Gengyi, Tran, Thien N., Huang, Liang, Deng, Erda, Blevins, Adrienne, Guo, Wenji, Ding, Yifu, and Lin, Haiqing. Wed . "Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation". United States. https://doi.org/10.1016/j.memsci.2021.120184. https://www.osti.gov/servlets/purl/1865821.
@article{osti_1865821,
title = {Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation},
author = {Zhang, Gengyi and Tran, Thien N. and Huang, Liang and Deng, Erda and Blevins, Adrienne and Guo, Wenji and Ding, Yifu and Lin, Haiqing},
abstractNote = {Cross-linked amorphous poly(ethylene oxide) (XLPEO) is one of the leading membrane materials for post-combustion CO2 capture. For example, XLPEO prepared from poly(ethylene glycol) methyl ether acrylate (PEGMEA) exhibited CO2 permeability of 570 Barrer and CO2/N2 selectivity of 41 at 35 °C. However, these XLPEOs cannot be dissolved in coating solutions, making it impossible to be fabricated into thin-film composite (TFC) membranes using state-of-the-art manufacturing processes. In this study, we synthesized high molecular weight yet soluble HPEO via atom transfer radical polymerization (ATRP). These polymers were thoroughly characterized and compared with XLPEO, including thermal transitions, free volumes, and pure-gas sorption and permeation properties. A polymer with the best combination of CO2 permeability (540 Barrer) and CO2/N2 selectivity (43) was fabricated into defect-free TFC membranes with a thickness as thin as 506 ± 44 nm. When challenged with simulated flue gas containing water vapor at 35 °C for over 100 h, the membrane shows stable CO2 permeance of 850 GPU and CO2/N2 selectivity of 37, comparable to the leading commercial membranes for carbon capture.},
doi = {10.1016/j.memsci.2021.120184},
journal = {Journal of Membrane Science},
number = ,
volume = 644,
place = {United States},
year = {Wed Dec 15 00:00:00 EST 2021},
month = {Wed Dec 15 00:00:00 EST 2021}
}

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