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Title: A comprehensive thermodynamic model for high salinity produced waters

Journal Article · · AIChE Journal
DOI: https://doi.org/10.1002/aic.16818 · OSTI ID:1572116

Abstract 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 + , Mg 2+ , Ca 2+ , Cl , and SO 4 2− , 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.

Sponsoring Organization:
USDOE
Grant/Contract Number:
EE0007888
OSTI ID:
1572116
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 1 Vol. 66; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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