scholarly journals Computation of Isobaric Vapor-Liquid Equilibrium Data for Binary and Ternary Mixtures of Methanol, Water, and Ethanoic Acid from T, p, x, and HmE Measurements

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Daming Gao ◽  
Hui Zhang ◽  
Peter Lücking ◽  
Hong Sun ◽  
Jingyu Si ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Ternary System ◽  
Vapor Phase ◽  
Binary Systems ◽  
Model Parameters ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Molar Excess ◽  
Ethanoic Acid ◽  
Vle Data

Vapor-liquid equilibrium (VLE) data for the strongly associated ternary system methanol + water + ethanoic acid and the three constituent binary systems have been determined by the total pressure-temperature-liquid-phase composition-molar excess enthalpy of mixing of the liquid phase (p, T, x, HmE) for the binary systems using a novel pump ebulliometer at 101.325 kPa. The vapor-phase compositions of these binary systems had been calculated from Tpx and HmE based on the Q function of molar excess Gibbs energy through an indirect method. Moreover, the experimental T, x data are used to estimate nonrandom two-liquid (NRTL), Wilson, Margules, and van Laar model parameters, and these parameters in turn are used to calculate vapor-phase compositions. The activity coefficients of the solution were correlated with NRTL, Wilson, Margules, and van Laar models through fitting by least-squares method. The VLE data of the ternary system were well predicted from these binary interaction parameters of NRTL, Wilson, Margules, and van Laar model parameters without any additional adjustment to build the thermodynamic model of VLE for the ternary system and obtain the vapor-phase compositions and the calculated bubble points.

Correlation and Prediction of Vapor-Liquid Equilibrium for the Propylene Oxide-Ethanol-Water Ternary System

2011 ◽  
Vol 396-398 ◽  
pp. 973-976
Author(s):  
Cheng Xue Wang ◽  
Rui Xia Jiang
Keyword(s):  
Experimental Data ◽  
Ternary System ◽  
Propylene Oxide ◽  
Binary Systems ◽  
Molar Fraction ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vle Data ◽  
Consistency Verification ◽  
Vapor Liquid

The vapor-liquid equilibrium (VLE) data for the binary systems ethanol-water (1), propylene oxide (PO)-ethanol (2), PO-water (3) and the ternary system PO-ethanol-water (4) were determined at 101.3kPa. The binary VLE data measured passed the thermodynamic consistency verification. The experimental VLE data of the binary systems were correlated with the nonrandom two-liquid (NRTL) models. The results show that the values of molar fraction of the ternary system (4) in vapor phase from the binary NRTL parameters agree well with the experimental data.

scholarly journals Vapor−Liquid Equilibrium For The Mixture of m-Xylene, Ethylbenzene and 1, 2, 4-Trichlorobenzene at 101.3 kPa

2021 ◽  
Author(s):  
Min Li ◽  
Yingmin Yu ◽  
Lanmu Liu ◽  
Jun Li ◽  
Yuhe Song
Keyword(s):  
Binary Data ◽  
Binary Systems ◽  
Extractive Distillation ◽  
Binary Interaction ◽  
Model Parameters ◽  
Liquid Equilibrium ◽  
Binary Interaction Parameters ◽  
Vle Data ◽  
Activity Coefficient Models ◽  
Vapor Liquid

Abstract The vapor-liquid phase equilibrium (VLE) data for binary systems of m-xylene + ethylbenzene, m-xylene + 1, 2, 4-trichlorobenzene, ethylbenzene + 1, 2, 4-trichlorobenzene and ternary system of m-xylene + ethylbenzene + 1, 2, 4-trichlorobenzene were determined with a modified Rose still at 101.3 kPa, and all the binary data passed the Wisniak’s test, which accorded with the thermodynamic consistency. Three activity coefficient models namely, Wilson, NRTL and UNIQUAC were used to correlate VLE data and get binary interaction parameters, then the ternary VLE data of m-xylene + ethylbenzene + 1, 2, 4-trichlorobenzene were estimated based on these model parameters using Aspen Plus software. The estimation values of the three models agree well with the experimental data. Moreover, the effect of 1, 2, 4-trichlorobenzene was analyzed, and it found to be an effective candidate extractant for the extractive distillation of ethylbenzene from mixed xylenes.

scholarly journals Isothermal Vapor-Liquid Equilibrium of Methanol + Glycerol and 1-Propanol + Glycerol

2018 ◽  
Vol 16 (1) ◽  
pp. 111 ◽  
Author(s):  
Annas Wiguno ◽  
Asalil Mustain ◽  
Wahyu Fazar Eka Irwansyah ◽  
Gede Wibawa
Keyword(s):  
Experimental Data ◽  
Liquid Phase ◽  
Ideal Liquid ◽  
Vapor Pressures ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vle Data ◽  
Activity Coefficient Models ◽  
The Ideal ◽  
Vapor Liquid

Isothermal vapor-liquid equilibrium (VLE) data for two binary mixtures of methanol + glycerol and 1-propanol + glycerol were determined at the temperature range from (313.15 to 363.15) K using a simple quasi-static ebulliometer. All systems showed that the vapor pressures increased with increasing alcohols (methanol or 1-propanol) concentrations at corresponding system. The Wilson, Non-Random Two-Liquid (NRTL) and Universal Quasi-Chemical (UNIQUAC) activity coefficient models were used to correlate the experimental data. Both systems showed slightly deviations from the ideal liquid phase behavior.

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