Premium
Solid‐liquid equilibria in the ternary system nacl‐kcl‐h 2 o
Author(s) -
Farelo F.,
Von Brachel G.,
Offermann H.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710119
Subject(s) - ternary operation , thermodynamics , pitzer equations , activity coefficient , solubility , ternary numeral system , phase diagram , virial coefficient , electrolyte , chemistry , atmospheric temperature range , non random two liquid model , phase (matter) , materials science , physics , aqueous solution , organic chemistry , computer science , programming language , electrode
Binary and ternary solubility data were measured for the NaCl‐KCl‐H 2 O system in the temperature range 293‐360 K using a standard visual method. The solid‐liquid phase diagram of the ternary system was calculated from the binary data and from the activity coefficients of the electrolytes evaluated by the Pitzer model. Some empirical functions of temperature were used to describe the virial coefficients. The calculated ternary solubilities were compared with the experimental values yielding a very good agreement. Therefore, it was possible to conclude that, in the range of concentration and temperature studied, the Pitzer model provides an excellent representation of the activity coefficients, thus allowing the accurate prediction of solubilities in the ternary system.