Analysis of partition coefficients of ternary liquid-liquid equilibrium systems and finding consistency using UNIQUAC model

• Autorzy: Islam A. W. , Zavvadi A. , Kabadi V. N.
• Języki publikacji: EN

Abstrakty

EN

The objective of this study is to investigate the change in partition coefficient with a change in the concentration of the solute in a liquid system consisting of two relatively immiscible solvents. To investigate the changes in the partition coefficients, the data of the partition coefficients at infinite dilution and the ternary Liquid-Liquid Equilibrium (LLE) data at finite concentrations of the solute should be consistent. In this study, 29 ternary systems that are found in literature and for which the partition coefficients at infinite dilution and the ternary LLE data cannot be predicted accurately by the universal quasi-chemical (UNIQUAC) model are identified. On the basis of this model, some consistent and inconsistent ternary systems are introduced. Three inconsistent systems, namely hexane-butanol-water, CC14 (carbon tetrachloride)-PA (propanoic acid)-water, and hexane-PA-water, are chosen for detailed analysis in this study. The UNIQUAC activity coefficient model is used to represent these data over a range of concentrations. The results show large errors, exhibiting the inability of this model to correlate the data. Furthermore, some ternary systems in which cross behavior of solutes between two phases observed are identified.

Słowa kluczowe

EN

partition coefficients; UNIQUAC model; consistent systems; inconsistent systems; cross behavior

PL

współczynnik podziału; model UNIQUAC; systemy niespójne

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2012
• Tom: Vol. 33, nr 2
• Strony: 243--253
• Opis fizyczny: Bibliogr. 16 poz., tab.

Twórcy

autor

Islam A. W.

autor

Zavvadi A.

autor

Kabadi V. N.

• North Carolina A&T State University, Department of Chemical Engineering, 1601 East Market Street, Greensboro, North Carolina 27411, USA

Bibliografia

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