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has been cited by the following article:

• TITLE: CO2 Capture at Room Temperature and Ambient Pressure: Isomer Effect in Room Temperature Ionic Liquid/Propanol Solutions

  AUTHORS: Hiroshi Abe, Azusa Takeshita, Hirokazu Sudo, Koichi Akiyama, Hiroaki Kishimura

  KEYWORDS: CO2 Capture, Room Temperature Ionic Liquids, Propanol Isomer Effect, Torsion Angle of TFSI- Anion

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.6 No.2, May 25, 2016

  ABSTRACT: A CO2 capture system without supercritical CO2 was optimized for mixtures of hydrophobic room temperature ionic liquids (RTILs) and propanol. We tested RTILs using bis(trifluoromethanesulfonyl)imide, TFSI-, anion and four quaternary ammonium cations, two quaternary phosphonium cations, and one imidazolium cation. The addition of 2-propanol into the RTILs clearly promoted the capture of normal CO2(nCO2) at ambient temperature and pressure. When combined with 2-propanol, the most efficient RTILs for nCO2 capture were N-butyl-N,N,N-trimethylammonium TFSI-. This enhancement of nCO2 capture was not observed in RTIL mixtures with 1-propanol or in propanol mixtures containing other phosphonium- and imidazolium-based RTILs. The torsion angle of TFSI-, which was calculated using density functional theory, is thought to be related to high nCO2 capture efficiently.