Density, Viscosity, and CO2 Solubility in the Ionic Liquid Mixtures of [bmim][PF6] and [bmim][TFSA] at 313.15 K

作者：Kodama Daisuke^*; Sato Kaoko; Watanabe Masaki; Sugawara Toshiya; Makino Takashi; Kanakubo Mitsuhiro

来源：Journal of Chemical and Engineering Data, 2018, 63(4): 1036-1043.

DOI：10.1021/acs.jced.7b00786

The density and viscosity of 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6]), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([bmim][TFSA]), and their mixtures were measured at 313.15 K and at atmospheric pressure. Furthermore, the CO2 solubilities and the CO2-saturated densities of [bmim] [PF6], [bmim]-[TFSA], and their mixtures were determined at 313.15 K and pressures up to 8.5 MPa using a volume-variable high-pressure apparatus. The ionic liquid mixtures were prepared at the mole fractions of [bmim][PF6] of 0.25, 0.50, and 0.75. The CO2 solubilities in both the mole fraction and molarity scales increased with the composition of [bmim] [TFSA], and the pressure-mole fraction curves showed a typical behavior for the physical absorption. The CO2-saturated density of the ionic liquid phase decreased with increasing the composition of [bmim] [PF6] and the pressure. Excess volumetric properties were calculated from the pressure-volume-mole fraction relations.

• 出版日期2018-4