### Abstract

A comprehensive thermodynamic model based on electrolyte NRTL activity coefficient model is developed for KCl+H_{2}O binary and KCl+NaCl+H_{2}O ternary systems. To model KCl+H_{2}O binary systems, we identify required binary interaction parameters for (K^{+}Cl^{-}):H_{2}O pair by regressing experimental thermodynamic data including mean ionic activity coefficient, osmotic coefficient, vapor pressure, enthalpy, and heat capacity. To model KCl+NaCl+H_{2}O ternary systems, we obtain required binary interaction parameters for (Na^{+}Cl^{-}):H_{2}O pair from the literature and (K^{+}Cl^{-}):(Na^{+}Cl^{-}) pair by regressing available thermodynamic data including osmotic coefficient, vapor pressure, and solubility for KCl+NaCl+H_{2}O ternary systems. The model accurately represents all thermodynamic properties with temperature from 273.15 to 473.15K and electrolyte concentration up to saturation. This model should be useful for process modeling and simulation of aqueous electrolyte solutions involving KCl.

Original language | English |
---|---|

Pages (from-to) | 169-177 |

Number of pages | 9 |

Journal | Fluid Phase Equilibria |

Volume | 387 |

DOIs | |

State | Published - Feb 5 2015 |

### Keywords

- Electrolyte NRTL model
- Potassium chloride
- Sodium chloride
- Solubility
- Thermodynamic properties

## Fingerprint Dive into the research topics of 'Thermodynamic modeling of KCl+H<sub>2</sub>O and KCl+NaCl+H<sub>2</sub>O systems using electrolyte NRTL model'. Together they form a unique fingerprint.

## Cite this

_{2}O and KCl+NaCl+H

_{2}O systems using electrolyte NRTL model.

*Fluid Phase Equilibria*,

*387*, 169-177. https://doi.org/10.1016/j.fluid.2014.12.014