Novel pyrrolidinium-based polymeric ionic liquids with cyano counter-anions

HIGH performance membrane materials for post-combustion CO2 separation

Liliana C. Tomé, Mehmet Isik, Carmen S R Freire, David Mecerreyes, Isabel Maria Marrucho Ferreira

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Polymeric ionic liquids (PILs) are blossoming as a new generation of materials at the interface of many areas leading to a renaissance of the field of ionic polymers. Although PILs are interesting membranes materials for CO2 separation, additional research is still required to realize their full potential. In this work, pyrrolidinium-based polymers containing different cyano-functionalized counter-anions were synthesized by straightforward anion exchange reactions and characterized. Their film forming ability blended with different amounts of free ionic liquid (IL) was evaluated and the CO2 and N2 permeation properties through the prepared composites were determined. The results show that increasing the IL content in the composites not only increased CO2 permeability but also boosted the CO2/N2 permselectivity, leading to improved separation performances. The best performance was achieved for the C(CN)3-based membrane containing 60wt% of IL, which overcomes the Robeson 2008 upper bound, with CO2 permeability of 439.3Barrer and CO2/N2 permselectivity of 64.4. Therefore, the pyrrolidinium-based PIL combined with the [C(CN)3]- as counter-anion has potential for efficient post-combustion CO2 separation, suggesting the preparation of high performance membranes for industrial applications.

Original languageEnglish
Pages (from-to)155-165
Number of pages11
JournalJournal of Membrane Science
Volume483
DOIs
Publication statusPublished - 1 Jun 2015

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Ionic Liquids
Ionic liquids
Anions
counters
Negative ions
anions
membranes
Membranes
liquids
Permeability
permeability
Polymers
composite materials
Composite materials
polymers
Permeation
Industrial applications
Ion exchange
preparation
Research

Keywords

  • Composites
  • Gas permeation
  • Ionic liquids
  • Membrane forming ability
  • Polymeric ionic liquids

Cite this

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title = "Novel pyrrolidinium-based polymeric ionic liquids with cyano counter-anions: HIGH performance membrane materials for post-combustion CO2 separation",
abstract = "Polymeric ionic liquids (PILs) are blossoming as a new generation of materials at the interface of many areas leading to a renaissance of the field of ionic polymers. Although PILs are interesting membranes materials for CO2 separation, additional research is still required to realize their full potential. In this work, pyrrolidinium-based polymers containing different cyano-functionalized counter-anions were synthesized by straightforward anion exchange reactions and characterized. Their film forming ability blended with different amounts of free ionic liquid (IL) was evaluated and the CO2 and N2 permeation properties through the prepared composites were determined. The results show that increasing the IL content in the composites not only increased CO2 permeability but also boosted the CO2/N2 permselectivity, leading to improved separation performances. The best performance was achieved for the C(CN)3-based membrane containing 60wt{\%} of IL, which overcomes the Robeson 2008 upper bound, with CO2 permeability of 439.3Barrer and CO2/N2 permselectivity of 64.4. Therefore, the pyrrolidinium-based PIL combined with the [C(CN)3]- as counter-anion has potential for efficient post-combustion CO2 separation, suggesting the preparation of high performance membranes for industrial applications.",
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author = "Tom{\'e}, {Liliana C.} and Mehmet Isik and Freire, {Carmen S R} and David Mecerreyes and {Marrucho Ferreira}, {Isabel Maria}",
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T1 - Novel pyrrolidinium-based polymeric ionic liquids with cyano counter-anions

T2 - HIGH performance membrane materials for post-combustion CO2 separation

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AU - Isik, Mehmet

AU - Freire, Carmen S R

AU - Mecerreyes, David

AU - Marrucho Ferreira, Isabel Maria

PY - 2015/6/1

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N2 - Polymeric ionic liquids (PILs) are blossoming as a new generation of materials at the interface of many areas leading to a renaissance of the field of ionic polymers. Although PILs are interesting membranes materials for CO2 separation, additional research is still required to realize their full potential. In this work, pyrrolidinium-based polymers containing different cyano-functionalized counter-anions were synthesized by straightforward anion exchange reactions and characterized. Their film forming ability blended with different amounts of free ionic liquid (IL) was evaluated and the CO2 and N2 permeation properties through the prepared composites were determined. The results show that increasing the IL content in the composites not only increased CO2 permeability but also boosted the CO2/N2 permselectivity, leading to improved separation performances. The best performance was achieved for the C(CN)3-based membrane containing 60wt% of IL, which overcomes the Robeson 2008 upper bound, with CO2 permeability of 439.3Barrer and CO2/N2 permselectivity of 64.4. Therefore, the pyrrolidinium-based PIL combined with the [C(CN)3]- as counter-anion has potential for efficient post-combustion CO2 separation, suggesting the preparation of high performance membranes for industrial applications.

AB - Polymeric ionic liquids (PILs) are blossoming as a new generation of materials at the interface of many areas leading to a renaissance of the field of ionic polymers. Although PILs are interesting membranes materials for CO2 separation, additional research is still required to realize their full potential. In this work, pyrrolidinium-based polymers containing different cyano-functionalized counter-anions were synthesized by straightforward anion exchange reactions and characterized. Their film forming ability blended with different amounts of free ionic liquid (IL) was evaluated and the CO2 and N2 permeation properties through the prepared composites were determined. The results show that increasing the IL content in the composites not only increased CO2 permeability but also boosted the CO2/N2 permselectivity, leading to improved separation performances. The best performance was achieved for the C(CN)3-based membrane containing 60wt% of IL, which overcomes the Robeson 2008 upper bound, with CO2 permeability of 439.3Barrer and CO2/N2 permselectivity of 64.4. Therefore, the pyrrolidinium-based PIL combined with the [C(CN)3]- as counter-anion has potential for efficient post-combustion CO2 separation, suggesting the preparation of high performance membranes for industrial applications.

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