Vapour-liquid equilibrium at low pressures from the back equation of state

1983 ◽  
Vol 48 (10) ◽  
pp. 2713-2720 ◽  
Author(s):  
Tomáš Boublík
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Binary Mixtures ◽  
Thermodynamic Functions ◽  
Mixing Rules ◽  
Liquid Equilibrium ◽  
Semiempirical Equation ◽  
Equilibrium Data ◽  
Excess Thermodynamic Functions ◽  
Low Pressures

The BACK semiempirical equation of state was employed to determine the excess thermodynamic functions of five binary mixtures composed of benzene with cyclohexane, n-pentane, n-hexane, n-heptane, and n-octane at 298.15 K. Two sets of mixing rules are discussed and values of the excess thermodynamic functions of equimolar solutions, calculated on their basis, are compared with experimental data. The calculated and experimental equilibrium data are compared in the x-y diagrams.

Vapour-liquid equilibrium at low pressures from the back equation of state. II. Ternary systems

1984 ◽  
Vol 49 (5) ◽  
pp. 1240-1246
Author(s):  
Tomáš Boublík
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Ternary Systems ◽  
Liquid Equilibrium ◽  
Pure Compounds ◽  
Benzene Toluene ◽  
Excess Thermodynamic Functions ◽  
Low Pressures

Ternary equilibrium diagrams in the n-hexane-cyclohexane-benzene system at temperature 298.15 K and n-hexane-benzene-toluene system at pressure 101.325 kPa were determined from the BACK equation of state. In the course of the determination of excess thermodynamic functions of mixtures the values of the BACK equation parameters for pure compounds and binary interactions parameters, ki,j, adjusted to GE and HE of the corresponding binaries were employed. The comparison of theoretical and experimental data shows very good quality of the prediction of the equilibrium behaviour of polycomponent systems from the BACK equation of state.

Parameters of the Bender Equation of State for Chloro Derivatives of Methane and Chlorobenzene

2001 ◽  
Vol 66 (6) ◽  
pp. 833-854 ◽  
Author(s):  
Ivan Cibulka ◽  
Lubomír Hnědkovský ◽  
Květoslav Růžička
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Liquid Equilibrium ◽  
Second Virial Coefficients ◽  
Equilibrium Data ◽  
State Behaviour ◽  
Derivatives Of

Values of adjustable parameters of the Bender equation of state evaluated for chloromethane, dichloromethane, trichloromethane, tetrachloromethane, and chlorobenzene from published experimental data are presented. Experimental data employed in the evaluation included the data on state behaviour (p-ρ-T) of fluid phases, vapour-liquid equilibrium data (saturated vapour pressures and orthobaric densities), second virial coefficients, and the coordinates of the gas-liquid critical point. The description of second virial coefficient by the equation of state is examined.

scholarly journals Experimental measurement and modelling of vapour-liquid equilibrium data for the C2F4-C3F6-s-C4F8 system

2011 ◽  
Vol 30 (1) ◽  
Author(s):  
Francois J. Conradie
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Binary System ◽  
Activity Coefficient ◽  
Mixing Rule ◽  
Liquid Equilibrium ◽  
Activity Coefficient Model ◽  
Equilibrium Data ◽  
Robinson Equation ◽  
Alpha Function

The vapour-liquid equilibrium data for the C2F4-C3F6-s-C4F8 system are presented. Each binary system was evaluated at three isotherms. The experimental data will be correlated to the Peng-Robinson equation of state, incorporating the Mathias-Copeman alpha function, with the Wong-Sandler mixing rule utilising the NRTL activity coefficient model.

Properties of Refrigerants from Cubic Equations of State

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Feroiu ◽  
Dan Geana ◽  
Catinca Secuianu
Keyword(s):  
Experimental Data ◽  
Vapor Pressure ◽  
Equations Of State ◽  
Ternary Mixtures ◽  
Volumetric Properties ◽  
Mixing Rules ◽  
Saturation Curve ◽  
Equilibrium Thermodynamic ◽  
Liquid Equilibrium ◽  
Binary And Ternary Mixtures

Vapour � liquid equilibrium, thermodynamic and volumetric properties were predicted for three pure hydrofluorocarbons: difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2 � tetrafluoroethane (R134a) as well as for binary and ternary mixtures of these refrigerants. Three cubic equations of state GEOS3C, SRK (Soave � Redlich � Kwong) and PR (Peng � Robinson) were used. A wide comparison with literature experimental data was made. For the refrigerant mixtures, classical van der Waals mixing rules without interaction parameters were used. The GEOS3C equation, with three parameters estimated by matching several points on the saturation curve (vapor pressure and corresponding liquid volumes), compares favorably to other equations in literature, being simple enough for applications.

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.

Vapor–Liquid Equilibrium Data for 1-Methyl-2-Pyrrolidone + (1-Butanol or 1-Hexene or Water) Binary Mixtures

2014 ◽  
Vol 59 (5) ◽  
pp. 1643-1650 ◽  
Author(s):  
Ranjeetha Hirawan ◽  
Sumit Sinha ◽  
Samuel A. Iwarere ◽  
J. David Raal ◽  
Paramespri Naidoo ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Vapor Liquid

Applicability of cubic equation of state mixing rules on correlation of excess molar volume of Non-Electrolyte binary mixtures

2004 ◽  
Vol 42 (2) ◽  
pp. 147-158 ◽  
Author(s):  
Mirjana Lj. Kijevčanin ◽  
Bojan D. Djordjević ◽  
Slobodan P. Šerbanović ◽  
Ivona R. Grgurić ◽  
Aleksandar Ž Tasić
Keyword(s):  
Equation Of State ◽  
Molar Volume ◽  
Binary Mixtures ◽  
Excess Molar Volume ◽  
Mixing Rules ◽  
Cubic Equation Of State ◽  
Cubic Equation ◽  
State Mixing
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