TY - JOUR

T1 - Thermodynamic Modeling of Aqueous Na+ - K+ - Cl- - SO42- Quarternary System with Electrolyte NRTL Model

AU - Bhattacharia, Sanjoy

AU - Hossain, Nazir

AU - Chen, Chau-Chyun

PY - 2015/10

Y1 - 2015/10

N2 - A comprehensive thermodynamic model based on electrolyte non-random two-liquid (eNRTL) equation is developed for aqueous Na+-K+-Cl--SO42- quaternary system. To account for the composition dependence of the solution nonideality, the eNRTL model requires two binary interaction parameters for each of the four electrolyte-water and four electrolyte-electrolyte pairs. We obtain the eNRTL binary parameters for (K+SO42-):H2O pair, (K+SO42-):(Ne+SO42-) pair and (K+ Cl-):(K+ SO42-) pair by regressing literature data. The eNRTL binary parameters for the other electrolyte-water and electrolyte-electrolyte pairs are retrieved from the literature. To account for the temperature dependence, each of the eNRTL binary parameter is correlated with a Gibbs-Helmholtz type expression with up to three temperature coefficients. The eNRTL model accurately represents various thermodynamic properties of the aqueous quaternary system and its subsystems with temperatures up to 473.15 K and electrolyte concentrat

AB - A comprehensive thermodynamic model based on electrolyte non-random two-liquid (eNRTL) equation is developed for aqueous Na+-K+-Cl--SO42- quaternary system. To account for the composition dependence of the solution nonideality, the eNRTL model requires two binary interaction parameters for each of the four electrolyte-water and four electrolyte-electrolyte pairs. We obtain the eNRTL binary parameters for (K+SO42-):H2O pair, (K+SO42-):(Ne+SO42-) pair and (K+ Cl-):(K+ SO42-) pair by regressing literature data. The eNRTL binary parameters for the other electrolyte-water and electrolyte-electrolyte pairs are retrieved from the literature. To account for the temperature dependence, each of the eNRTL binary parameter is correlated with a Gibbs-Helmholtz type expression with up to three temperature coefficients. The eNRTL model accurately represents various thermodynamic properties of the aqueous quaternary system and its subsystems with temperatures up to 473.15 K and electrolyte concentrat

U2 - 10.1016/j.fluid.2015.05.045

DO - 10.1016/j.fluid.2015.05.045

M3 - Article

SP - 1

EP - 9

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

ER -