Densities at Pressures up to 200 MPa and Atmospheric Pressure Viscosities of Ionic Liquids 1-Ethyl-3-methylimidazolium Methylphosphate, 1-Ethyl-3-methylimidazolium Diethylphosphate, 1-Butyl-3-methylimidazolium Acetate, and 1-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide

被引:58
作者
Hiraga, Yuya [1 ]
Kato, Aya [1 ]
Sato, Yoshiyuki [2 ]
Smith, Richard L., Jr. [1 ,2 ]
机构
[1] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, Sendai, Miyagi 9808579, Japan
[2] Tohoku Univ, Res Ctr Supercrit Fluid Technol, Aoba Ku, Sendai, Miyagi 9808579, Japan
关键词
THERMODYNAMIC PROPERTIES; THERMOPHYSICAL PROPERTIES; SURFACE-TENSION; CELLULOSE; TEMPERATURE; DISSOLUTION; MIXTURES; CHLORIDE; ENTHALPIES; ABSORPTION;
D O I
10.1021/je5009679
中图分类号
O414.1 [热力学];
学科分类号
摘要
High pressure densities at (10200) MPa over a range of temperatures and atmospheric pressure viscosities at (293373) K for three ionic liquids (ILs) that are able to dissolve biomass, 1-ethyl-3-methylimidazolium methylphosphate ([emim][MP]), 1-ethyl-3-methylimidazolium diethylphosphate ([emim][DEP]), and 1-butyl-3-methylimidazolium acetate ([bmim][Ac]) are reported. Densities of the IL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf2N]) were measured at the same conditions to verify the apparatus and to extend the range of present data. The high pressure densities of [emim][MP] and [emim][DEP] are newly measured in this work. Combined expanded uncertainties of densities for [emim][MP], [emim][DEP], [bmim][Ac], and [bmim][Tf2N] were estimated to be 1.5 kg center dot m3, 1.4 kg center dot m(3), 1.4 kg center dot m3, and 1.7 kg center dot m(3), respectively. The Tait equation could correlate the experimental density data to within 0.03 % of average relative deviation. The derivative properties, isobaric expansivity, and isothermal compressibility were calculated using the Tait equation and it was observed that the isobaric expansivity decreased with increasing temperature. The trend of the isobaric expansivity and isothermal compressibility with temperature were in accordance with the theory of corresponding states using methanol for comparison.
引用
收藏
页码:876 / 885
页数:10
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