%0 Journal Article %T CO<sub>2</sub> Capture at Room Temperature and Ambient Pressure: Isomer Effect in Room Temperature Ionic Liquid/Propanol Solutions %A Hiroshi Abe %A Azusa Takeshita %A Hirokazu Sudo %A Koichi Akiyama %A Hiroaki Kishimura %J Green and Sustainable Chemistry %P 116-124 %@ 2160-696X %D 2016 %I Scientific Research Publishing %R 10.4236/gsc.2016.62011 %X 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 %K CO< %K sub> %K 2< %K /sub> %K Capture %K Room Temperature Ionic Liquids %K Propanol Isomer Effect %K Torsion Angle of TFSI- Anion %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=66738