Carbon dioxide capture by aqueous ionic liquid solutions

Jairton Dupont, Nathalia M. Simon, Marcileia Zanatta, Francisco P. Dos Santos, Marta C. Corvo, Eurico J. Cabrita

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Confined water in aqueous solutions of imidazolium-based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO2 to yield bicarbonate. Three types of CO2 sorption in these "IL aqueous solutions" were observed: physical, CO2-imidazolium adduct generation, and bicarbonate formation (up to 1.9mol(bicarbonate) mol(-1) of IL), resulting in a 10:1 (molar ratio) total absorption of CO2 relative to imidazolate anions in the presence of water 1:1000 (IL/water). These sorption values are higher than the classical alkanol amines or even alkaline aqueous solutions under similar experimental conditions.
Original languageEnglish
Pages (from-to)4927-4933
Number of pages7
JournalChemSusChem
Volume10
Issue number24
DOIs
Publication statusPublished - 22 Dec 2017

Fingerprint

Ionic Liquids
Ionic liquids
Carbon Dioxide
Carbon dioxide
Bicarbonates
carbon dioxide
bicarbonate
aqueous solution
Anions
Sorption
Water
anion
Negative ions
sorption
water
Amines
acetate
Acetates
ionic liquid

Keywords

  • bicarbonate species
  • carbon dioxide capture
  • confined water
  • ionic liquids
  • nuclear magnetic resonance

Cite this

Dupont, Jairton ; Simon, Nathalia M. ; Zanatta, Marcileia ; Dos Santos, Francisco P. ; Corvo, Marta C. ; Cabrita, Eurico J. / Carbon dioxide capture by aqueous ionic liquid solutions. In: ChemSusChem. 2017 ; Vol. 10, No. 24. pp. 4927-4933.
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author = "Jairton Dupont and Simon, {Nathalia M.} and Marcileia Zanatta and {Dos Santos}, {Francisco P.} and Corvo, {Marta C.} and Cabrita, {Eurico J.}",
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Dupont, J, Simon, NM, Zanatta, M, Dos Santos, FP, Corvo, MC & Cabrita, EJ 2017, 'Carbon dioxide capture by aqueous ionic liquid solutions', ChemSusChem, vol. 10, no. 24, pp. 4927-4933. https://doi.org/10.1002/cssc.201701044

Carbon dioxide capture by aqueous ionic liquid solutions. / Dupont, Jairton; Simon, Nathalia M.; Zanatta, Marcileia; Dos Santos, Francisco P.; Corvo, Marta C.; Cabrita, Eurico J.

In: ChemSusChem, Vol. 10, No. 24, 22.12.2017, p. 4927-4933.

Research output: Contribution to journalArticle

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T1 - Carbon dioxide capture by aqueous ionic liquid solutions

AU - Dupont, Jairton

AU - Simon, Nathalia M.

AU - Zanatta, Marcileia

AU - Dos Santos, Francisco P.

AU - Corvo, Marta C.

AU - Cabrita, Eurico J.

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PY - 2017/12/22

Y1 - 2017/12/22

N2 - Confined water in aqueous solutions of imidazolium-based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO2 to yield bicarbonate. Three types of CO2 sorption in these "IL aqueous solutions" were observed: physical, CO2-imidazolium adduct generation, and bicarbonate formation (up to 1.9mol(bicarbonate) mol(-1) of IL), resulting in a 10:1 (molar ratio) total absorption of CO2 relative to imidazolate anions in the presence of water 1:1000 (IL/water). These sorption values are higher than the classical alkanol amines or even alkaline aqueous solutions under similar experimental conditions.

AB - Confined water in aqueous solutions of imidazolium-based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO2 to yield bicarbonate. Three types of CO2 sorption in these "IL aqueous solutions" were observed: physical, CO2-imidazolium adduct generation, and bicarbonate formation (up to 1.9mol(bicarbonate) mol(-1) of IL), resulting in a 10:1 (molar ratio) total absorption of CO2 relative to imidazolate anions in the presence of water 1:1000 (IL/water). These sorption values are higher than the classical alkanol amines or even alkaline aqueous solutions under similar experimental conditions.

KW - bicarbonate species

KW - carbon dioxide capture

KW - confined water

KW - ionic liquids

KW - nuclear magnetic resonance

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