DISQUAC Predictions on Thermodynamic Properties of Ternary and Higher Multicomponent Mixtures. 3. Results forHEof Ternary Mixtures Containing One Alcohol, One Polar Compound, and One Hydrocarbon or Two Alcohols and One Hydrocarbon or a Polar Compound, or Three Alkanols

2004 ◽  
Vol 43 (23) ◽  
pp. 7622-7634 ◽  
Author(s):  
Juan Antonio González ◽  
Ismael Mozo ◽  
Isaías García de la Fuente ◽  
José Carlos Cobos
Keyword(s):  
Thermodynamic Properties ◽  
Ternary Mixtures ◽  
Multicomponent Mixtures ◽  
Polar Compound

DISQUAC predictions on thermodynamic properties of ternary and higher multicomponent mixtures. II. Results for HE of ternary mixtures containing nonpolar components, or one polar compound, two polar compounds, or one alcohol and hydrocarbons, or CCl4

2001 ◽  
Vol 79 (10) ◽  
pp. 1447-1459 ◽  
Author(s):  
Juan Antonio Gonzalez ◽  
Javier Carmona ◽  
Nicolas Riesco ◽  
Isaias Garcia de la Fuente ◽  
Jose Carlos Cobos
Keyword(s):  
Thermodynamic Properties ◽  
Binary Systems ◽  
Ternary Systems ◽  
Polar Compounds ◽  
Ternary Mixtures ◽  
Mean Deviation ◽  
Group Contributions ◽  
Polar Compound ◽  
The Mean ◽  
Vapor Liquid Equilibria

The ability of the DISQUAC model for predicting excess enthalpies (HE) of ternary systems on the basis of binary parameters only, i.e., neglecting ternary interactions is analyzed. At this end, DISQUAC results for a set of 95 ternary systems are examined. The solutions studied are formed by only hydrocarbons (or CCl4); or by one polar compound (not alcohols) and two hydrocarbons (or CCl4); or by two polar compounds (not alcohols) and one hydrocarbon (or CCl4); or by one alcohol and two hydrocarbons (or CCl4). Most of the HEs analyzed are endothermic, and valid at 298.15 K and atmospheric pressure. The mean deviation between experimental values and DISQUAC results is 5.5% for the ternary systems and 6.5% for the constituent binaries (181 mixtures). The interaction parameters used are valid for the description of thermodynamic properties of binary systems: vapor–liquid equilibria (VLE), liquid–liquid (LLE), and solid–liquid equilibria (SLE), HE and excess heat capacities at constant pressure (CEP), as well as HE and VLE of ternary solutions. Predictions are, in most of the cases, independent of the mixture compounds, or the number of groups present in the system. Larger deviations underline typical shortcomings of the group contributions methods (e.g., Patterson's effect; branching). Note that results for the ternaries and for the constituent binaries are of the same order. This is not the case for the Dortmund version of UNIFAC. The mean deviations obtained using this model are 10.5% and 14% for the ternary and binary mixtures, respectively. Results from other models (original UNIFAC, Flory's theory, Nitta–Chao, UNIQUAC association model) for a number of systems are also compared to those obtained using DISQUAC.Key words: predictions, HE, ternary systems, binary parameters, geometrical methods, Flory, group contributions.

Measurement and correlation of thermodynamic properties of ternary mixtures of oxygenated fuel

2020 ◽  
Vol 37 (7) ◽  
pp. 1181-1194 ◽  
Author(s):  
Suman Gahlyan ◽  
Rekha Devi ◽  
Sweety Verma ◽  
Manju Rani ◽  
So-Jin Park ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Ternary Mixtures ◽  
Oxygenated Fuel

scholarly journals CFD Modeling to Predict Mass Transfer in Multicomponent Mixtures

2019 ◽  
Vol 14 (4) ◽  
Author(s):  
Mitra Sadat Lavasani ◽  
Rahbar Rahimi ◽  
Mortaza Zivdar ◽  
Mohammad Kalbassi
Keyword(s):  
Mass Transfer ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Ternary Mixtures ◽  
Cfd Modeling ◽  
Multicomponent Mixtures ◽  
Distillation Columns ◽  
Multicomponent Distillation ◽  
Interactive Nature ◽  
Two Phases

Abstract A novel three-dimensional computational fluid dynamics mass transfer (CMT) model in Eulerian–Eulerian frame work is deploys for investigating the concentration profiles, and trays efficiencies in multicomponent distillation columns. The proposed model is based on Maxwell Stefan equations, and CFD was employed as a powerful tool to model the hydrodynamics and mass transfer. The two phases are modelled as two interpenetrating phases with interphase momentum, heat and mass transfer. The Closure model is developed for mass interphase transfer rate in ternary mixtures. The predictability of the mass transfer behaviours of multicomponent can result in a more efficient and predictable design of distillation trays. Two non-ideal ternary mixtures were studied. The tray geometry and operating conditions are based on the experimental works of Kalbassi and the composition profiles, tray efficiencies, and point efficiencies of mixtures were presented. The obtained results were confirmed by the experimental data. The results indicate that the values of individual component tray efficiencies and point efficiencies for these multicomponent systems were considerably different which confirm the interactive nature of the mass transfer in multicomponent mixtures. These mixtures also illustrated different point efficiencies across the tray because of the composition dependency of these mixtures. The average relative error for the prediction of efficiencies is about 8 %, which indicates the accuracy of the model.

Thermodynamic properties of binary and ternary mixtures of the refrigerants R32, R125, R134a, and R143a

1997 ◽  
Vol 29 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Ralf Köster ◽  
Gerhard Herres ◽  
Martin Buschmeier ◽  
Dieter Gorenflo
Keyword(s):  
Thermodynamic Properties ◽  
Ternary Mixtures ◽  
Binary And Ternary Mixtures
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