The thermal stability of three ionic liquids (ILs) with the same anion and different lengths imadazolium cations was investigated using thermogravimetric analysis to consider their usefulness for potential application as absorbents in absorption heat pumps refrigeration cycles. First, influence experimental conditions such sample mass, heating rate, atmosphere analyzed one these ILs. Afterward, dynamic isothermal studies were performed From results, onset temperature has been often selected...

Abstract In this work, a general f‐theory viscosity model based on the perturbed‐chain statistical associating fluid theory (PC‐SAFT) equation of state (EoS) has been developed for description behavior normal alkanes family (from methane to n‐octadecane). This shown provide satisfactory results modeling as well carbon dioxide and nitrogen over wide ranges temperatures up 100 MPa. addition, using simple mixing rules, an evaluation performance carried out several n‐alkane + mixtures...

New experimental densities and surface tensions for binary mixtures of {heptane + 1-butanol, 1-hexanol, 1-octanol} in a temperature range (288.15, 293.15, 298.15, 303.15, 308.15) K are reported the whole composition range. Densities were measured with an Anton Paar DMA 4500 densimeter. Surface using Lauda TVT2 automated tensiometer, which uses principle pending drop volume. The data pure liquids have been used to calculate excess molar volumes tension deviations as function mole fractions.

This work was motivated by the fundamental interest in study of mixtures containing ionic liquids and fluorinated alcohols but also possibility use these refrigeration applications. The thermophysical properties will contribute to evaluate reliability as an absorbent several with refrigerant 2,2,2-trifluoroethanol. Thus, densities, ρ, over temperature ranges from (283.15 323.15) K (293.15 2,2,2-trifluoroethanol (TFE) + 1-butyl-3-methylimidazolium tetrafluoroborate ([C1C4im][BF4])...

The perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state was shown to be suitable for pure components and mixtures solvents gases as well liquid−liquid vapor−liquid equilibria polymer systems. In this work, the ability PC-SAFT predict complex phase behavior that can found in carbon dioxide + n-alkane systems analyzed. pure-component parameters were taken from literature, kij binary interaction parameter calculated by using experimental vapor−liquid−liquid CO2...

New experimental densities in the compressed liquid state are reported for pentaerythritol tetrapentanoate (PEC5) over temperature range of 278.15−353.15 K and pressures up to 45 MPa. Density values (99 data) have been measured with a high-pressure vibrating tube densimeter. A correction factor that was due viscosity sample applied density values. These data were used determine isothermal compressibilities, isobaric thermal expansion coefficients, internal this compound. Furthermore,...

2,2,2-Trifluoroethanol (TFE) + ionic liquids constitute new possible refrigerant/absorbent pairs in refrigeration and heat absorption systems. In this work, volumetric data were measured on these systems order to estimate their potential as alternatives the commonly used fluids. Original high-pressure (up 40 MPa) density of mixtures 2,2,2-trifluoroethanol 1-methyl-3-ethylimidazolium tetrafluoroborate, [EMIm][BF4], or 1-methyl-3-butylimidazolium bis(trifluoromethanesulfonyl)imide,...

A novel refrigerant−absorbent system for absorption refrigeration based on ionic liquids as absorbents and a fluoroalcohol the refrigerant is analyzed. New data of densities at several temperatures in 283.15−333.15 K range pressures up to 40 MPa have been measured. Experimental used study behavior influence temperature, pressure, composition isothermal compressibility isobaric thermal expansion coefficient. In addition, vapor saturated density 2,2,2-trifluoroethanol were determine PC-SAFT...

Binary systems of two ionic liquids (ILs), 1-ethylpyridinium methanesulfonate [C2Py][MeSO3] and choline dihydrogen phosphate [Chol][H2PO4], water have been experimentally studied. Density, viscosity, electrical conductivity proton activity measured at several temperatures covering all the miscibility range. From density data, isobaric coefficient thermal expansion was calculated to study volumetric behavior mixtures. All data were fit using polynomial equations. The Vogel–Fulcher–Tamman...

Excess volumes at 298.15 K and atmospheric pressure of some organic carbonate+alkane binary systems have been measured using an Anton Paar 602 HP densimeter. For the first time, published data on excess enthalpies, volumes, Gibbs energies above-mentioned together with vaporisation enthalpies molar pure carbonates, were used to estimate interaction parameters between carbonate group O–CO–O methyl methylene groups, CH3, CH2, respectively. The mean deviations experimental theoretical values...

In this work, 144 new experimental density values are reported for diethylene glycol monomethyl ether (DEGME) and monoethyl (DEGEE) in the compressed liquid phase between 283.15 K 353.15 pressures up to 25 MPa. The measurements were performed with an Anton Paar DMA 60/512P vibrating tube densimeter then correlated by using a Tammann−Tait equation standard deviations of 1 × 10-4 g·cm-3. isothermal compressibility, isobaric thermal expansivity, internal pressure have been determined from data....

The density of the asymmetrical binary systems (ethanol + linalool), (propan-1-ol and (propan-2-ol linalool) has been measured (660 points) for nine different compositions including pure compounds at four temperatures in range (283.15 to 328.15) K 5 isobars up 20 MPa with a vibrating-tube densimeter. experimental expanded uncertainty is estimated be ± 0.5 kg·m−3. isothermal compressibility, isobaric thermal expansion, excess molar volume were derived from data, revealing that contraction...