Thermodynamic properties of the NiCl2–CoCl2–KCl system

Abstract

The thermodynamic behavior of NiCl2 in NiCl2–CoCl2–KCl ternary solutions was investigated using formation cells of the type, (−) Ni/NiCl2–CoCl2–KCl/C, Cl2(gas, 1 atm)(+). The values of the NiCl2 activity coefficients indicate a non-ideal system consonant with the formation of complex species. The NiCl2 activity coefficients at 1000 K were fitted to the polynomial equation,[Formula: see text]where[Formula: see text]The experimental data were limited to the ranges 0 ≤ t ≤ 0.80 and 0.10 ≤ y ≤ 0.5. Keywords: molten salt, thermodynamic properties, nickel chloride, non-ideal solution, complex species.