In this work, new experimental data on thermodynamic properties of ionic liquid (IL) aqueous solutions are presented. The (vapor + liquid) phase equilibria, density, and dynamic viscosity binary mixtures composed N,N-diethyl-N-methylammonium bromide ([NH,1,2,2][Br]), or methanesulfonate ([NH,1,2,2][CH3SO3]) water presented as functions temperature composition. Both ILs were synthesized specific...

This work reports high-pressure cloud point data for the quaternary system glycerol + olive oil + n-butane + AOT surfactant. The static synthetic method, using a variable-volume view cell, was employed for obtaining the experimental data at pressures up to 27 MPa. The effects of glycerol/olive oil concentration and surfactant addition on the pressure transition values were evaluated in the temp...

High pressure vapor-liquid equilibrium (VLE) of CO2-expanded organic solvents is investigated using Peng-Robinson-LCVM-UNIFAC equation of state. Bubble pressure of ten ternary mixtures is predicted using this mixing rule and correlations are developed based only on binary experimental data. Due to the lack of experimental data for liquid phase density in the literature, it was necessary to perf...

This work reports saturated-phase densities for the CO2 + methylcyclohexane system at temperatures between 298 and 448 K pressures up to critical pressure. The were measured with a standard uncertainty of <1.5 kg·m–3 fitted along isotherms recently developed nonlinear empirical correlation an absolute average deviation (ΔAAD) about 1.5 kg·m–3. also allowed estimation pressure density each tempe...

This paper describes a properties-optimization work for the working fluids in NH3 / ionic liquid (ILs) based singleeffect absorption heat pumps. The optimum parameters of the IL can be used as criteria in screening task-specified ILs, which play the role of absorbents, in absorption heat pumps. First, a 8-parameter thermodynamic model to calculate performances of a single-effect absorption heat...

This study reports liquid–liquid equilibrium (LLE) and liquid–liquid–liquid (LLLE) data for binary (phenol + n- dodecane, or n -hexadecane) ternary (water phenol systems measured under atmospheric pressure. The compositions of coexisting phases were determined with analytical cloud point methods at temperatures 298 K – 353 K. Non–Random Two–Liquid (NRTL) excess Gibbs energy model was employed t...

Transportation of natural gas extracted from subterranean reservoirs is subject to several risks introduced by the presence water. These can be mitigated through subsea dehydration, design which requires an accurate understanding thermodynamics these systems. Having previously investigated use mono-ethylene glycol as a dehydration agent, this research focusses on industry workhorse: tri-ethylen...

New experimental data on the thermodynamic properties of imidazolium-based ionic liquids (ILs) and {IL + water} solutions are presented. The isothermal (vapor liquid) phase equilibrium (VLE) density binary mixtures composed 1-ethyl-3-methylimidazolium formate, [EMIM][HCOO], or acetate, [EMIM][CH3COO], water demonstrated. were measured at temperatures from 298.15 to 348.15 K over a wide IL mole ...

The identification of the correct thermodynamic states forming in supercritical mixing and combustion is an important area research engineering. When a multi-component mixture evolves at pressures that are higher than critical each individual component, real-gas (RG) equation state (EoS) must be used order to achieve superior accuracy predictions. However, this may not enough when complex non-l...