J. Santafé

Thermodynamic and transport properties of binary mixtures containing 1,3-dioxolane

This paper reports density and viscosity measurements for the binary mixtures of cyclopentane or cyclohexane or benzene with 1,3-dioxolane at 283.15, 298.15, and 313.15 K. From the experimental data, excess volumes and excess viscosities were calculated and the results were fitted to a Redlich–Kister-type equation. The results are discussed in terms of molecular interactions. The Prigogine–Flory–Patterson and Blomfield–Dewan theories were used to analyze the results at 298.15 K.

Experimental paperSolubility of gases in butanols. I. Solubilities of nonpolar gases in 1-butanol from 263.15 to 303.15 K at 101.33 kPa partial pressure of gas

Solubility measurements of 15 nonpolar gases (He, Ne, Ar, Kr, Xe, H2, D2, N2, O2, CH4, C2H4, C2H6, CF4, SF6 and CO2) in 1-butanol were carried out at 263.15, 273.15, 283.15, 293.15, and 303.15 K and partial pressure of gas of 101.33 kPa. Standard changes in thermodynamic functions for the solution process at 298.15 K (Gibbs energy, enthalpy and entropy) are derived from the experimental values of the solubility of gases and its variation with temperature. Lennard-Jones 6,12 pair potential parameters and the dependence of the effective hard-sphere diameter with respect to the temperature for 1-butanol have been estimated using the equations of scaled particle theory (SPT). Making use of SPT in the reverse direction, i.e., starting from the potential parameters found through it, theoretical solubilities and thermodynamic functions for the solution process have been calculated and compared with the experimental values.

Densities, speeds of sound and isentropic compressibilities of binary and ternary mixtures containing benzene, cyclohexane and hexane at 298.15 K

Abstract Densities, ϱ, and speeds of sound, u , have been measured for the ternary mixture {benzene + cyclohexane + hexane} and the corresponding binary mixtures {benzene + cyclohexane}, {benzene + hexane} and {cyclohexane + hexane}, at the temperature 298.15 K. Using these results, the isentropic compressibilities, κ s , the excess isentropic compressibilities, κ s E , and the speeds of sound deviations, Δu , have been calculated for both the binary mixtures and the ternary system. Excess isentropic compressibilities, κ s E , and the speeds of sound deviations, Δu , have been fitted to the Redlich-Kister equation in the case of binary mixtures, while the equation of Cibulka was used to fit the values relating to the ternary system. The empiric equations of Redlich-Kister, Tsao-Smith, Kohler and Colinet have been applied in order to predict the κ s E and Δu of ternary mixtures from the binary contributions.

Densities and excess molar volumes of the ternary mixture (1-butanol+n-hexane+1-chlorobutane) at 298.15 and 313.15 K. Application of the ERAS model

Abstract Densities of the liquid mixtures (n-hexane+1-chlorobutane) and (1-butanol+n-hexane+1-chlorobutane) have been measured by the vibrating tube technique at 298.15 K and 313.15 K. With these densities, excess molar volumes were calculated. An extended version of the so-called ERAS model has been used for describing VE of the complete ternary system at 298.15 K. Qualitatively the ERAS-model gives an adequate representation of this system, being similar the shapes of both the experimental and the predicted curves.

Solubility of gases in butanols II. Solubilities of nonpolar gases in 2-methyl-1-propanol from 263.15 to 303.15 K at 101.33 kPa partial pressure of gas

Abstract Solubilities of 15 nonpolar gases (He, Ne, Ar, Kr, Xe, H2, D2, N2, O2, CH4, C2H4, C2H6, CF4, SF6 and CO2) in 2-methyl-1-propanol have been measured at 263.15, 273.15, 283.15, 293.15, and 303.15 K and at the partial pressure of gas 101.33 kPa. Standard changes in the thermodynamic properties for the solution process (enthalpies, entropies and Gibbs energies) at 298.15 K have been derived from the experimental data. The scaled particle theory (SPT) has been applied in order to estimate the Lennard-Jones 6,12 pair potential parameters at 298.15 K and the dependence of the effective hard-sphere diameter on the temperature for 2-methyl-1-propanol. Theoretical solubilities and values for the thermodynamic functions have been calculated using the SPT in the reverse direction starting from the potential parameters. Results for 2-methyl-1-propanol have been compared with those corresponding to 1-butanol.

Isobaric VLE data for the binary systems dibromomethane with isomeric butanols at 40.0 and 101.3 kPa

Isobaric vapour-liquid equilibrium data at 40.0 and 101.3 kPa for the binary systems dibromomethane with 1-butanol, 2-butanol, 2-methyl-1-propanol and 2-methyl-2-propanol are reported. All the systems show minimum temperature azeotropes. The experimental data were tested for thermodynamic consistency and correlated with the Margules, Van Laar, Wilson, NRTL and UNIQUAC equations. Predictions with the UNIFAC method were also obtained.