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Title: Low-Energy Water Recovery from Subsurface Brines

Abstract

A novel non-aqueous phase solvent (NAS) desalination process was proposed and developed in this research project. The NAS desalination process uses less energy than thermal processes, doesn’t require any additional chemicals for precipitation, and can be utilized to treat high TDS brine. In this project, our experimental work determined that water solubility changes and selective absorption are the key characteristics of NAS technology for successful desalination. Three NAS desalination mechanisms were investigated: (1) CO 2 switchable, (2) high-temp absorption to low-temp desorption (thermally switchable), and (3) low-temp absorption to high-temp desorption (thermally switchable). Among these mechanisms, thermally switchable (low-temp absorption to high-temp desorption) showed the highest water recovery and relatively high salt rejection. A test procedure for semi-continuous, bench scale NAS desalination process was also developed and used to assess performance under a range of conditions.

Authors:
 [1];  [1];  [1]
  1. RTI International, Research Triangle Park, NC (United States)
Publication Date:
Research Org.:
RTI International, Research Triangle Park, NC (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
Contributing Org.:
Veolia, NC State University
OSTI Identifier:
1430501
Report Number(s):
DOE-RTI-FE0026212-1
DOE Contract Number:
FE0026212
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 29 ENERGY PLANNING, POLICY, AND ECONOMY; 20 FOSSIL-FUELED POWER PLANTS; desalination; CO2 injection; deep well aquifer

Citation Formats

Choi, Young Chul, Kim, Gyu Dong, and Hendren, Zachary. Low-Energy Water Recovery from Subsurface Brines. United States: N. p., 2018. Web. doi:10.2172/1430501.
Choi, Young Chul, Kim, Gyu Dong, & Hendren, Zachary. Low-Energy Water Recovery from Subsurface Brines. United States. doi:10.2172/1430501.
Choi, Young Chul, Kim, Gyu Dong, and Hendren, Zachary. Fri . "Low-Energy Water Recovery from Subsurface Brines". United States. doi:10.2172/1430501. https://www.osti.gov/servlets/purl/1430501.
@article{osti_1430501,
title = {Low-Energy Water Recovery from Subsurface Brines},
author = {Choi, Young Chul and Kim, Gyu Dong and Hendren, Zachary},
abstractNote = {A novel non-aqueous phase solvent (NAS) desalination process was proposed and developed in this research project. The NAS desalination process uses less energy than thermal processes, doesn’t require any additional chemicals for precipitation, and can be utilized to treat high TDS brine. In this project, our experimental work determined that water solubility changes and selective absorption are the key characteristics of NAS technology for successful desalination. Three NAS desalination mechanisms were investigated: (1) CO2 switchable, (2) high-temp absorption to low-temp desorption (thermally switchable), and (3) low-temp absorption to high-temp desorption (thermally switchable). Among these mechanisms, thermally switchable (low-temp absorption to high-temp desorption) showed the highest water recovery and relatively high salt rejection. A test procedure for semi-continuous, bench scale NAS desalination process was also developed and used to assess performance under a range of conditions.},
doi = {10.2172/1430501},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 30 00:00:00 EDT 2018},
month = {Fri Mar 30 00:00:00 EDT 2018}
}

Technical Report:

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