Pure- and mixed-gas permeation properties of highly selective and plasticization resistant hydroxyl-diamine-based 6FDA polyimides for CO2/CH4 separation
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- 作者：Nasser Alaslai ; Bader Ghanem ; Fahd Alghunaimi ; Eric Litwiller ; Ingo Pinnau ; ingo.pinnau@kaust.edu.sa" class="auth_mail" title="E-mail the corresponding author
- 关键词：Polyimides ; 6FDA ; Hydroxyl functionalization ; Natural gas ; Mixed-gas permeation ; Plasticization
- 刊名：Journal of Membrane Science
- 出版年：2016
- 出版时间：1 May 2016
- 年：2016
- 卷：505
- 期：Complete
- 页码：100-107
- 全文大小：1463 K
文摘
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Hydroxyl-functionalized 6FDA-DAP and 6FDA-DAR polyimides showed very high pure-gas CO2/CH4 permselectivity of ~90.
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Enhanced pure-gas CO2/CH4 permselectivity was primarily due to high diffusivity selectivity.
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Mixed-gas selectivity at 10 atm partial CO2 pressure was reduced to 75.
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Plasticization was minimized by introduction of hydroxyl groups.