TY - JOUR
T1 - A comprehensive thermodynamic model for high salinity produced waters
AU - Tanveer, Sheik
AU - Chen, Chau Chyun
N1 - Publisher Copyright:
© 2019 American Institute of Chemical Engineers
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Reuse of produced waters in oil and gas production is a major concern due to high treatment cost and regulations on disposal in the environment. To support development of separation techniques and process innovations, we report a comprehensive thermodynamic model for the aqueous hexary system of Na+, K+, Mg2+, Ca2+, Cl−, and SO42−, the major ionic species present in high salinity produced waters. Based on the electrolyte NRTL theory, the model accurately calculates thermodynamic and phase equilibrium properties with two binary interaction parameters per water-electrolyte pair and electrolyte-electrolyte pair sharing a common ion. This article presents the methodology to identify the binary interaction parameters from literature data and the model results for wide varieties of thermodynamic and phase equilibrium properties including salt solubility for selected binary, ternary, quaternary, and quinary subsystems. The model is validated with the electrolyte concentrations up to salt saturation and temperatures from 273 to 473 K.
AB - Reuse of produced waters in oil and gas production is a major concern due to high treatment cost and regulations on disposal in the environment. To support development of separation techniques and process innovations, we report a comprehensive thermodynamic model for the aqueous hexary system of Na+, K+, Mg2+, Ca2+, Cl−, and SO42−, the major ionic species present in high salinity produced waters. Based on the electrolyte NRTL theory, the model accurately calculates thermodynamic and phase equilibrium properties with two binary interaction parameters per water-electrolyte pair and electrolyte-electrolyte pair sharing a common ion. This article presents the methodology to identify the binary interaction parameters from literature data and the model results for wide varieties of thermodynamic and phase equilibrium properties including salt solubility for selected binary, ternary, quaternary, and quinary subsystems. The model is validated with the electrolyte concentrations up to salt saturation and temperatures from 273 to 473 K.
KW - aqueous electrolytes
KW - electrolyte NRTL model
KW - hexary oceanic salt systems
KW - salt solubility
KW - thermodynamic properties
UR - http://www.scopus.com/inward/record.url?scp=85074611772&partnerID=8YFLogxK
U2 - 10.1002/aic.16818
DO - 10.1002/aic.16818
M3 - Article
AN - SCOPUS:85074611772
SN - 0001-1541
VL - 66
JO - AIChE Journal
JF - AIChE Journal
IS - 1
M1 - e16818
ER -