Effect of CO2 dissolution on electrical conductivity and self-diffusion coefficients of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid

被引：9

作者：

Umecky, Tatsuya ^{[1
]}

Kanakubo, Mitsuhiro ^{[2
]}

Makino, Takashi ^{[2
]}

Aizawa, Takafumi ^{[2
]}

Suzuki, Akira ^{[2
]}

机构：

[1] Saga Univ, Grad Sch Sci & Engn, Dept Chem & Appl Chem, Saga 8408502, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Ctr Compact Chem Syst, Miyagino Ku, Sendai, Miyagi 9838551, Japan

来源：

FLUID PHASE EQUILIBRIA | 2013年 / 357卷

关键词：

Ionic liquid; CO2; Electrical conductivity; Self-diffusion coefficient; Transport property; PRESSURE PHASE-BEHAVIOR; REGULAR SOLUTION THEORY; CARBON-DIOXIDE; THERMODYNAMIC PROPERTIES; TRANSPORT-PROPERTIES; ELEVATED PRESSURES; GAS SOLUBILITY; FIELD GRADIENT; TEMPERATURE; DIFFUSIVITIES;

D O I：

10.1016/j.fluid.2013.05.023

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We have determined the electrical conductivity in CO2-saturated 1-butyl-3-methylimidazolium hexafluorophosphate ([C(4)mim][PF6]) at 298.1, 313.1 and 333.1 K as a function of CO2 pressure. Moreover, self-diffusion coefficients of cation and anion in CO2-saturated [C(4)mim][PF6] have been measured at high pressures up to similar to 15 MPa and at a fixed temperature of 333.2 K by H-1 and F-19 NMR using the pulsed field gradient spin-echo method. As CO2 dissolves in [C(4)mim][PF6], marked increases in all the three transport quantities were observed at lower pressure, and then they showed very slight changes at higher pressure. The correlation between the conductivity and the ionic diffusion coefficients has been discussed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：76 / 79

页数：4

共 29 条

[1] High-pressure phase behavior of carbon dioxide with imidazolium-based ionic liquids [J].