Simultaneous description of excess properties and vapor–liquid equilibria for associating mixtures by hydrogen-bonding lattice fluid equation of state

2003 ◽  
Vol 212 (1-2) ◽  
pp. 221-231 ◽  
Author(s):  
B.H. Park ◽  
K.-P. Yoo ◽  
C.S. Lee
Keyword(s):  
Hydrogen Bonding ◽  
Equation Of State ◽  
Excess Properties ◽  
Fluid Equation ◽  
Lattice Fluid ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

Thermodynamic modeling of vapor-liquid equilibria and excess properties of the binary systems containing diethers and n-alkanes by cubic equation of state

2004 ◽  
Vol 21 (4) ◽  
pp. 858-866 ◽  
Author(s):  
Slobodan P. šerbanović ◽  
Ivona R. Grgurić ◽  
Mirjana Lj. Kijevčanin ◽  
Aleksandar Z. Tasić ◽  
Bojan D. Djordjević
Keyword(s):  
Equation Of State ◽  
Thermodynamic Modeling ◽  
Binary Systems ◽  
Excess Properties ◽  
Cubic Equation Of State ◽  
Cubic Equation ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

scholarly journals Towards the Equation of State for Neutral (C2H4), Polar (H2O), and Ionic ([bmim][BF4], [bmim][PF6], [pmmim][Tf2N]) Liquids

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Vitaly B. Rogankov ◽  
Valeriy I. Levchenko
Keyword(s):  
Experimental Data ◽  
Ionic Liquids ◽  
Equation Of State ◽  
High Pressures ◽  
Strong Dependence ◽  
Fluid Equation ◽  
Lattice Fluid ◽  
Wide Range ◽  
Derived Properties ◽  
Vapor Liquid

Despite considerable effort of experimentalists no reliable vapor-liquid coexistence at very small pressures and liquid-solid coexistence at high pressures have been until now observed in the working range of temperature 290<T/K<350 for ionic liquids. The measurements of high-pressure properties in low-temperature stable liquid are relatively scarce while the strong influence of their consistency on the phase equilibrium prediction is obvious. In this work we discuss the applicability of fluctuational-thermodynamic methodology and respective equation of state to correlate the properties of any (neutral, polar, ionic) liquids since our ultimate goal is the simple reference predictive model to describe vapor-liquid, liquid-liquid, and liquid-solid equilibria of mixtures containing above components. It is shown that the inconsistencies among existing volumetric measurements and the strong dependence of the mechanical and, especially, caloric derived properties on the shape of the functions chosen to fit the experimental data can be resolved in the framework of fluctuational-thermodynamic equation of state. To illustrate its results the comparison with the known experimental data for [bmim][BF4] and [bmim][PF6] as well as with the lattice-fluid equation of state and the methodology of thermodynamic integration is represented. It corroborates the thermodynamic consistency of predictions and excellent correlation of derived properties over the wide range of pressures 0<P/MPa<200.

Liquid–liquid equilibrium correlations using lattice fluid equation of state with hydrogen bonding

2008 ◽  
Vol 14 (2) ◽  
pp. 219-223
Author(s):  
Alexander Breitholz ◽  
Ki-Pung Yoo ◽  
Jong Sung Lim ◽  
Chul Soo Lee ◽  
Jeong Won Kang
Keyword(s):  
Hydrogen Bonding ◽  
Equation Of State ◽  
Liquid Equilibrium ◽  
Fluid Equation ◽  
Lattice Fluid

Molar excess enthalpies, volumes, and Gibbs free energies of methanol – isomeric butanol systems at 25 °C

1970 ◽  
Vol 48 (16) ◽  
pp. 2457-2465 ◽  
Author(s):  
Jiří Polák ◽  
Sachio Murakami ◽  
V. T. Lam ◽  
H. D. Pflug ◽  
G. C. Benson
Keyword(s):  
Hydrogen Bonding ◽  
Binary Systems ◽  
Excess Properties ◽  
Excess Enthalpies ◽  
Free Energies ◽  
Molar Excess ◽  
Tert Butanol ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

The vapor–liquid equilibria of the 4 binary systems formed by mixing methanol with n-butanol, isobutanol, sec-butanol, and tert-butanol were investigated at 25 °C in a dynamic still with circulation. The results were used to calculate the molar excess Gibbs free energies. For the three systems containing isobutanol, sec-butanol, or tert-butanol, molar excess enthalpies and volumes were also determined (mainly at 25 °C) by direct calorimetric and dilatometric techniques. The behavior of the excess properties is discussed with reference to differences in the hydrogen bonding and in the shapes of the component molecules.

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