Liquid-vapour equilibrium and heats of mixing in the 1-propanol-acetonitrile system

1982 ◽  
Vol 47 (12) ◽  
pp. 3188-3198 ◽  
Author(s):  
Vladimír Dohnal ◽  
František Veselý ◽  
Jaroslav Vinš
Keyword(s):  
Excess Functions ◽  
Data Sets ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Energy Parameters ◽  
Extensive Data ◽  
Heats Of Mixing ◽  
Equilibrium Data ◽  
The Individual ◽  
Two Parameter

Vapour-liquid equilibrium and heats of mixing were measured in the 1-propanol-acetonitrile system. The vapour-liquid equilibrium data measurements were carried out under isobaric conditions at the pressures 37.54, 56.44 and 86.05 kPa and isothermally at temperatures of 333.25 and 351.22 K. The heats of mixing were measured at temperatures of 298.15, 308.15 and 318.15 K. The individual vapour-liquid equilibrium data sets were correlated by various two-parameter equations, the data on heats of mixing by a Redlich-Kister polynomial. The extensive data obtained for both excess functions, covering the temperature range of 60 K, were correlated successfully by the Wilson equation with the energy parameters dependent quadratically on temperature.

Liquid-vapour equilibrium and heats of mixing in the ethanol-acetonitrile system

1982 ◽  
Vol 47 (12) ◽  
pp. 3177-3187 ◽  
Author(s):  
Vladimír Dohnal ◽  
František Veselý ◽  
Robert Holub ◽  
Jiří Pick
Keyword(s):  
Excess Functions ◽  
Data Sets ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Energy Parameters ◽  
Extensive Data ◽  
Heats Of Mixing ◽  
Equilibrium Data ◽  
The Individual ◽  
Two Parameter

Vapour-liquid equilibrium and heats of mixing were measured in the ethanol-acetonitrile system. The isobaric vapour-liquid equilibrium measurements were carried out at the pressures of 43.35, 56.44, 69.48 and 86.05 kPa and the heats of mixing were measured at the temperatures of 298.15, 308.15 and 318.15 K. The individual vapour-liquid equilibrium data sets were correlated by various two-parameter equations and the data on heats of mixing by the Redlich-Kister polynomial. The extensive data obtained for both excess functions, covering the temperature range of 50 K, were correlated successfully by the Wilson equation with the energy parameters linearly dependent on temperature.

Isothermal and isobaric vapour-liquid equilibrium data in the tetrachloromethane-sec-butyl alcohol system

1983 ◽  
Vol 48 (9) ◽  
pp. 2446-2453 ◽  
Author(s):  
Jan Linek
Keyword(s):  
Experimental Data ◽  
Boiling Point ◽  
Butyl Alcohol ◽  
Correlation Equations ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Raoult’S Law ◽  
System A ◽  
Equilibrium Data ◽  
Alcohol System

Isothermal vapour-liquid equilibrium data at 65, 73 and 80 °C and isobaric ones at 101.3 kPa were measured in the tetrachloromethane-sec-butyl alcohol system. A modified circulation still of the Gillespie type was used for the measurements. Under the conditions of measurement, the system exhibits positive deviations from Raoult's law and minimum boiling-point azeotropes. The experimental data were fitted to a number of correlation equations, the most suitable being the Wilson equation.

scholarly journals Vapor pressure, density, viscosity and refractive index of dimethyl sulfoxide + 1,4-dimethylbenzene system

2008 ◽  
Vol 73 (1) ◽  
pp. 73-85 ◽  
Author(s):  
Oana Ciocirlan ◽  
Olga Iulian
Keyword(s):  
Dimethyl Sulfoxide ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Refractive Indices ◽  
Excess Functions ◽  
Liquid Equilibrium ◽  
Viscosity Deviations ◽  
Unifac Model ◽  
Equilibrium Data ◽  
Kister Equation

This paper reports the experimental results of isothermal vapor-liquid equilibrium data between 303.15 and 333.15 K, and densities, viscosities, refractive indices from 298.15 to 323.15 K of the dimethyl sulfoxide + 1,4-dime?thylbenzene system over the entire range of mixture composition. The obtained PTX data were correlated by the Wilson and NRTL models and estimated by the UNIFAC model. The excess Gibbs energy and activity coefficients were calculated and compared with others excess properties. Excess molar volumes, viscosity deviations and deviations in refractivity were calculated from the experimental data; all the computed quantities were fitted to the Redlich-Kister equation. The resulting excess functions were interpreted in terms of structure and interactions.

scholarly journals A MODIFICATION OF THE WILSON EQUATION IN VAPOR-LIQUID EQUILIBRIUM DATA REDUCTION

1975 ◽  
Vol 8 (1) ◽  
pp. 71-72 ◽  
Author(s):  
ISAMU NAGATA ◽  
TOSHIRO YAMADA ◽  
KATSUJI GOTOH ◽  
KENJI KAZUMA
Keyword(s):  
Data Reduction ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Vapor Liquid

Simultaneous correlation of vapour-liquid equilibrium and heats of mixing and prediction of excess heat capacities. The systems benzene-n-alcohols and cyclohexane-n-alcohols

1979 ◽  
Vol 44 (3) ◽  
pp. 808-822 ◽  
Author(s):  
Vladimír Dohnal ◽  
Jaroslav Vinš ◽  
Robert Holub
Keyword(s):  
Experimental Data ◽  
Binary Systems ◽  
Heat Capacities ◽  
Heat Of Mixing ◽  
Data Sets ◽  
Wilson Equation ◽  
Excess Heat ◽  
Excess Heat Capacities ◽  
Heats Of Mixing ◽  
Quadratic Temperature

The Wilson, the enthalpic Wilson and the Orye equations were used for the simultaneous correlation of extensive data sets on VLE and heats of mixing of eight binary systems hydrocarbon-n-alcohol, viz. benzene-methanol, -ethanol, -n-propanol, -n-butanol, cyclohexane-ethanol, -n-propanol, -n-butanol and n-heptane-ethanol. The expected quadratic temperature dependence of parameters of these equations makes a good simultaneous description possible of excess free enthalpy and heat of mixing as a function of temperature. The Wilson equation gives demonstrably the best description of the experimental data. All the equations were as well used to predict excess heat capacities for the systems listed and the confidence intervals were estimated for the predicted results. The comparison with experimental data for four of these systems shows that the predicted excess heat capacities are in general in good agreement with the experiment; however, the Wilson equation yielded again the best results.

Isothermal and isobaric vapour-liquid equilibrium data in the tetrachloromethane-n-butyl alcohol system

1983 ◽  
Vol 48 (10) ◽  
pp. 2879-2887 ◽  
Author(s):  
Jan Linek
Keyword(s):  
Experimental Data ◽  
Boiling Point ◽  
Butyl Alcohol ◽  
Correlation Equations ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
System A ◽  
Equilibrium Data ◽  
Alcohol System ◽  
Kister Equation

Isothermal vapour-liquid equilibrium data at 65, 73 and 80 °C and isobaric ones at 101.3 kPa were measured in the tetrachloromethane-n-butyl alcohol system. A modified circulation still of the Gilespie type was used for the measurements. Under the conditions of measurements, the system exhibits positive deviations from Raoult's law and minimum boiling-point azeotropes. The experimental data were fitted to a number of correlation equations. The best correlation was reached with the Wilson equation but the regression failed in some cases. Therefore the results for the 5th order Redlich-Kister equation are presented.

scholarly journals Thermophysical Properties of the Lennard-Jones Fluid: Database and Data Assessment

2021 ◽  
Author(s):  
Simon Stephan ◽  
Monika Thol ◽  
Jadran Vrabec ◽  
Hans Hasse
Keyword(s):  
Heat Capacity ◽  
Vapor Pressure ◽  
Enthalpy Of Vaporization ◽  
Data Sets ◽  
Saturated Liquid ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Lennard Jones ◽  
Equilibrium Data ◽  
Vapor Liquid

Literature data on the thermophysical properties of the Lennard-Jones fluid, which were sampled with molecular dynamics and Monte Carlo simulations, were reviewed and assessed. The literature data were complemented by simulation data from the present work that were taken in regions in which previously only sparse data were available. Data on homogeneous state points (for given temperature T and density ρ: pressure p, thermal expansion coefficient α, isothermal compressibility β, thermal pressure coefficient γ, internal energy u, isochoric heat capacity cv, isobaric heat capacity cp, Grüneisen parameter Γ, Joule–Thomson coefficient μJT, speed of sound w, Helmholtz energy a, and chemical potential) were considered, as well as data on the vapor–liquid equilibrium (for given T: vapor pressure ps, saturated liquid and vapor densities ρ′ and ρ″, respectively, enthalpy of vaporization Δhv, and as well as surface tension γ). The entire set of available data, which contains about 35 000 data points, was digitalized and included in a database, which is made available in the Supporting Information of this paper. Different consistency tests were applied to assess the accuracy and precision of the data. The data on homogeneous states were evaluated pointwise using data from their respective vicinity and equations of state. Approximately 10% of all homogeneous bulk data were discarded as outliers. The vapor–liquid equilibrium data were assessed by tests based on the compressibility factor, the Clausius–Clapeyron equation, and by an outlier test. Seven particularly reliable vapor–liquid equilibrium data sets were identified. The mutual agreement of these data sets is approximately ±1% for the vapor pressure, ±0.2% for the saturated liquid density, ±1% for the saturated vapor density, and ±0.75% for the enthalpy of vaporization—excluding the region close to the critical point.

Sign in / Sign up

Export Citation Format

Share Document