화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.26, No.4, 1130-1136, July, 2009
DOI10.1007/s11814-009-0188-5  Export Citation
High-pressure solubility of carbon dioxide in imidazolium-based ionic liquids with anions [PF6] and [BF4]
Bang-Hyun Lim, Woo-Hyuk Choe, Jae-Jin Shim†, Choon Sup Ra1, Dirk Tuma2, Heun Lee3, and Chul Soo Lee4
  • School of Display and Chemical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Korea
  • 1Department of Chemistry, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Korea
  • 2BAM Federal Institute of Materials Research and Testing, Richard-Willst"atter-Str. 11, D-12489 Berlin, Germany
  • 3Department of Chemical and Biochemical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea
  • 4Department of Chemical and Biological Engineering, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul 131-071, Korea
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The solubility of carbon dioxide in three ionic liquids (ILs) under supercritical fluid condition was measured at pressures up to 32 MPa and at temperatures of 313.15, 323.15, and 333.15 K in a high-pressure view cell. The imidazolium-derivative ionic liquids 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), and 1-octyl-3-methylimidazolium tetrafluoroborate ([omim][BF4]) were employed in this research. The effects of pressure, temperature, nature of anion and cation as well as the water content on the solubility of CO2 in the ILs were investigated experimentally. The solubility of CO2 in the IL was higher for the ILs with longer cationic alkyl group and for the ILs with lower anion polarity. The lower the water content or the lower the temperature as well as the higher the pressure, the higher was the solubility of CO2.
Keywords:Solubility;Carbon Dioxide;Ionic Liquid;Water Content;Anion;Cation
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