CO2/N2 separation performance of supported ionic liquid membrane fabricated by [Choline][Pro]/ RTILs

Yankai Zhao, Tengteng Fan, Wenlong Xie, Suoying Zhang, Chang Liu, Xin Feng, Xiaohua Lu

Research output: Contribution to journalArticlepeer-review

Abstract

Three mixed ionic liquids ([Choline][Pro]/[EMIm][N(CN)2], [Choline][Pro]/[bmim][PF6] and [Choline][Pro]/[HMIm][NTf2]) were prepared by mixing room temperature ionic liquids (RTILs) with [Choline][Pro]. They were used to prepare SILMs by the impregnation method. Effects of operating temperature, pressure, type and content of RTILs on CO2/N2 separation performance of SILMs were investigated. The results showed that the CO2 permeability of the SILMs changed between 343.3-1936.9 barrer and CO2/N2 selectivity was in range of 10.3-34.8. Non-equilibrium thermodynamics was used to analyze CO2 transport mechanism in SILMs. The overall resistance showed a trend from decline to rise by increasing the proportion of [HMIm][NTf2] in the mixed ILs, which was in accordance with CO2 permeability in SILMs.

Original languageEnglish
Pages (from-to)2771-2780
Number of pages10
JournalHuagong Xuebao/CIESC Journal
Volume68
Issue number7
DOIs
StatePublished - 1 Jul 2017

Keywords

  • CO
  • Ionic liquids
  • SILMs
  • Separation
  • [Choline][Pro]

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