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Energy requirements of the switchable polarity solvent forward osmosis (SPS-FO) water purification process

Journal Article · · Desalination
A model was developed to estimate the process energy requirements of a switchable polarity solvent forward osmosis (SPS FO) system for water purification from aqueous NaCl feed solution concentrations ranging from 0.5 to 4.0 molal at an operational scale of 480 m3/day (feed stream). The model indicates recovering approximately 90% of the water from a feed solution with NaCl concentration similar to seawater using SPS FO would have total equivalent energy requirements between 2.4 and 4.3 kWh per m3 of purified water product. The process is predicted to be competitive with current costs for disposal/treatment of produced water from oil and gas drilling operations. As a result, once scaled up the SPS FO process may be a thermally driven desalination process that can compete with the cost of seawater reverse osmosis.
Research Organization:
Idaho National Laboratory, Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G)
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1251602
Alternate ID(s):
OSTI ID: 1246661
Report Number(s):
INL/JOU--15-34462; PII: S0011916415300205
Journal Information:
Desalination, Journal Name: Desalination Journal Issue: C Vol. 374; ISSN 0011-9164
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Diamines as switchable-hydrophilicity solvents with improved phase behaviour journal January 2018
Recent Advance on Draw Solutes Development in Forward Osmosis journal September 2018