Densities and isothermal compressibilities of ionic liquids-Modeling and application

被引：38
作者：
Abildskov, Jens [1 ]
Ellegaard, Martin D. [1 ]
O'Connell, John P. [2 ]
机构：
[1] DTU, Dept Chem & Biochem Engn, CAPEC, DK-2800 Lyngby, Denmark
[2] Univ Virginia, Dept Chem Engn, Charlottesville, VA 22904 USA
来源：
FLUID PHASE EQUILIBRIA | 2010年 / 295卷 / 02期
关键词：
Ionic liquids; Bulk modulus; Density; Compressibility; Fluctuation solution theory; THERMODYNAMIC PROPERTIES; VOLUMETRIC PROPERTIES; 1-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE; PRESSURE; TEMPERATURE; IMIDAZOLIUM; VISCOSITY; TETRAFLUOROBORATE; PREDICTION; RANGE;
D O I：
10.1016/j.fluid.2010.04.019
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Two corresponding-states forms have been developed for direct correlation function integrals in liquids to represent pressure effects on the volume of ionic liquids over wide ranges of temperature and pressure. The correlations can be analytically Integrated from a chosen reference density to provide a full equation of state for ionic liquids over reduced densities from 1 5 to more than 3 6. One approach is empirical with 3 parameters. the other is a 2-parameter theoretical form which is directly connected to a method for predicting gas solubilities in ionic liquids Parameters for both methods have been obtained for 28 different ionic liquid systems by reduction of carefully validated PpT data The results show excellent agreement with the experimental data for nearly all substances over all ranges of conditions Group contributions to parameters are also explored. leading to an entirely predictive method for ambient pressure densities and densities of compressed ionic liquids. Extensive comparisons are made with other techniques (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：215 / 229
页数：15
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