Elucidating the role of micropore-generating backbone motifs and amine functionality on membrane separation performance in complex mixtures
Name
2024_PAD_PAE-NH2-Part 2- SI.pdf
Description
Supporting information
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993.02 KB
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Adobe PDF
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116f0c4e693efb7e1d31bf7f4f04afc7
Name
2024_PAD_pae-nh2-part 2.pdf
Description
Accepted version
Size
747 KB
Format
Adobe PDF
Checksum (MD5)
f3bb96a2dd0ea9439e2814d0cde78f08
Author(s)
Mizrahi Rodriguez, Katherine
Dean, Pablo A
Guo, Sheng
Roy, Naksha
Swager, Timothy M
Smith, Zachary P
Date Issued
January 18, 2024
Journal
Journal of Membrane Science
Publisher
Elsevier BV
Version
Author's final manuscript
Abstract
While significant advancements have been made in the synthesis of microporous polymers for gas separations in the last two decades, little is known regarding structure–property relationships under industrially relevant conditions involving highly condensable gases such as H2S. Recent work on the mixed-gas transport in an amine-functionalized microporous PIM (PIM-NH2) has demonstrated benefits of simultaneous plasticization resistance and competitive sorption for increased permselectivity in binary CO2/CH4 mixtures. In this work, we elucidate the effects of analogous competitive sorption relationships through pure- and mixed-gas permeation in an amine-functional microporous poly(aryl ether) (PAE-NH2) and provide comparisons with PIM-NH2 and the corresponding nitrile-functional counterparts, PAE-CN and PIM-1. In binary mixed-gas tests, PAE-NH2 show a 2.5- and 2.4-fold increase in CO2/CH4 and CO2/N2 mixed-gas permselectivities, respectively, compared to the pure-gas case. In 20/20/60 H2S/CO2/CH4 mixtures, amine-functionalized derivatives retain increases in CO2/CH4 selectivities compared to the nitrile-functional analogues. Additionally, PIM-NH2, PAE-CN, and PAE-NH2 have excellent plasticization resistance in 50/50 CO2/CH4 binary mixed-gas tests up to 26 atm.
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Creative Commons Attribution-NonCommercial-NoDerivatives
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DOI of Published Version
https://doi.org/10.1016/j.memsci.2024.122464
