TY - JOUR
T1 - Thermodynamic modeling of aqueous Na+-K+-Cl--SO42- quaternary system with electrolyte NRTL model
AU - Bhattacharia, Sanjoy K.
AU - Hossain, Nazir
AU - Chen, Chau Chyun
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the Jack Maddox Distinguished Engineering Chair Professorship in Sustainable Energy sponsored by the J.F Maddox Foundation. The work is partially supported by a donation from the Apache Corporation.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/10/5
Y1 - 2015/10/5
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-):(Na+ 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 473.15K and electrolyte concentrations up to saturation.
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-):(Na+ 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 473.15K and electrolyte concentrations up to saturation.
KW - Aqueous brine solution
KW - Electrolyte NRTL model
KW - Potassium sulfate
KW - Solubility
KW - Thermodynamic properties
UR - http://www.scopus.com/inward/record.url?scp=84930939358&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2015.05.045
DO - 10.1016/j.fluid.2015.05.045
M3 - Article
AN - SCOPUS:84930939358
VL - 403
SP - 1
EP - 9
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
SN - 0378-3812
ER -