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Showing 1 to 11 of 11 for “"UNIQUAC"”.
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Vapor-liquid equilibrium model for the CO₂-H₂S-monoethanolamine-methyldiethanolamine-water system using the electrolyte-UNIQUAC equation, A
Includes bibliographical references.
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Thermodynamische Untersuchungen von Phasengleichgewichten in komplexen Systemen mit assoziierenden Komponenten
… with the activity coefficient models NRTL and UNIQUAC, as well as with the equations of state Elliott-Suresh-Donohue (ESD) and Perturbed-Chain-Statistical Associating Fluid Theory (PC-SAFT) which contain both a term to consider explicit hydrogen bonds. In addition, the predictive capabilities …
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Fundamental solubility study of polycyclic aromatic hydrocarbons in subcritical water and ethanol mixtures
… mild operating conditions to be maintained. The UNIQUAC, O-UNIFAC, and M-UNIFAC models were used to correlate the solubilities of PAHs in subcritical conditions. The UNIQUAC model best represents the solubilities of anthracene and p-terphenyl in binary and ternary systems while the O-UNIFAC and …
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MOQUAC, a new expression for the excess Gibbs free energy based on molecular orientations
… of a physically-founded improvement of the UNIQUAC combinatorial term. For the combinatorial contribution, a standard segment is used to determine the structural parameters r and q. It is generally assumed that the choice of the standard segment and the influence of the absolute value of q …
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Vapor-liquid equilibria of a low GWP refrigerant, R-1234ze(E), mixed with a POE lubricant
… is undertaken, namely: the Wilson model, NRTL, UNIQUAC, Heil, and Raoult’s law. Overall, the Heil model provides the best agreement in pressure predictions for R-1234ze(E)/RL68H mixtures, with RMS deviations less than 0.5%, while NRTL RMS deviations are less than 1%. However, comparable …
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Carboxylic acid and formaldehyde separation from aqueous solutions using ionic liquids
… coefficient/relative selectivity. <br/>The UNIQUAC method was employed to correlate the LLE data for pure IL systems. Some physical property data, such as density and viscosity, of ILs were correlated. The Joback group contribution method was used to predict the heat capacities of some ILs …
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Evaluation of physical properties of ionic liquids
… and a molecular solvent, were modelled using the UNIQUAC and UNIFAC methods. A user-friendly web based interface was established and all the mutual solubility data between the ionic liquid and molecular solvents were uploaded to the online database, which allows end user to get reference data in …
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Measurements of the Molar Heat Capacity and the Molar Excess Enthalpy for Various Alkanolamines in Aqueous Solutions
… modelslike NRTL (Non-random Two-liquid), UNIQUAC (Universal-Quasi chemical), and UNIFAC (Universal Functional activity coefficient) were used to model the experimental values of the molar excess enthalpies. Among the three above-mentioned models, the modified UNIFAC (Dortmund) was the most …
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Vapour-liquid equilibrium studies at atmospheric to moderate pressures
… have been used to investigate the dependence of UNIQUAC parameters with temperature. The data have in addition been used to compare directly the performance of the predictive methods - Original UNIFAC, a modified version of UNIFAC, and the new novel technique, based on molecular parameters …
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A comparison of thermodynamic models for the prediction of phase behavior in aqueous-polymer two-phase systems
… local composition models (NRTL, Wilson, and UNIQUAC); and two group-contribution models (ASOG and UNIFAC) are all discussed. The development of a solvent-electrolyte model (Chen's model) based on local composition theory (in particular the NRTL model) is reviewed, and the subsequent possible …
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SYNTHESIS AND CHARACTERIZATION OF SUPPORTED SOLID ACID CATALYSTS FOR CONVERSION OF GREEN SEED CANOLA OIL TO BIODIESEL
… and product species were estimated using the UNIQUAC method. The Eley-Rideal reaction pathway with the surface reaction of adsorbed methanol as the rate controlling step, was found to be a reliable representation of the observed kinetics. In the fifth phase, techno-economic feasibility and …