Thin-Film Composite Pressure Retarded Osmosis Membranes for Sustainable Power Generation from Salinity Gradients

Handle URI:
http://hdl.handle.net/10754/600009
Title:
Thin-Film Composite Pressure Retarded Osmosis Membranes for Sustainable Power Generation from Salinity Gradients
Authors:
Yip, Ngai Yin; Tiraferri, Alberto; Phillip, William A.; Schiffman, Jessica D.; Hoover, Laura A.; Kim, Yu Chang; Elimelech, Menachem
Abstract:
Pressure retarded osmosis has the potential to produce renewable energy from natural salinity gradients. This work presents the fabrication of thin-film composite membranes customized for high performance in pressure retarded osmosis. We also present the development of a theoretical model to predict the water flux in pressure retarded osmosis, from which we can predict the power density that can be achieved by a membrane. The model is the first to incorporate external concentration polarization, a performance limiting phenomenon that becomes significant for high-performance membranes. The fabricated membranes consist of a selective polyamide layer formed by interfacial polymerization on top of a polysulfone support layer made by phase separation. The highly porous support layer (structural parameter S = 349 μm), which minimizes internal concentration polarization, allows the transport properties of the active layer to be customized to enhance PRO performance. It is shown that a hand-cast membrane that balances permeability and selectivity (A = 5.81 L m-2 h-1 bar-1, B = 0.88 L m-2 h-1) is projected to achieve the highest potential peak power density of 10.0 W/m2 for a river water feed solution and seawater draw solution. The outstanding performance of this membrane is attributed to the high water permeability of the active layer, coupled with a moderate salt permeability and the ability of the support layer to suppress the undesirable accumulation of leaked salt in the porous support. Membranes with greater selectivity (i.e., lower salt permeability, B = 0.16 L m-2 h-1) suffered from a lower water permeability (A = 1.74 L m-2 h-1 bar-1) and would yield a lower peak power density of 6.1 W/m2, while membranes with a higher permeability and lower selectivity (A = 7.55 L m-2 h-1 bar-1, B = 5.45 L m-2 h-1) performed poorly due to severe reverse salt permeation, resulting in a similar projected peak power density of 6.1 W/m2. © 2011 American Chemical Society.
Citation:
Yip NY, Tiraferri A, Phillip WA, Schiffman JD, Hoover LA, et al. (2011) Thin-Film Composite Pressure Retarded Osmosis Membranes for Sustainable Power Generation from Salinity Gradients. Environ Sci Technol 45: 4360–4369. Available: http://dx.doi.org/10.1021/es104325z.
Publisher:
American Chemical Society (ACS)
Journal:
Environmental Science & Technology
Issue Date:
15-May-2011
DOI:
10.1021/es104325z
PubMed ID:
21491936
Type:
Article
ISSN:
0013-936X; 1520-5851
Sponsors:
This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST); the WaterCAMPWS, a Science and Technology Center of Advanced Materials for the Purification of Water with Systems under the National Science Foundation Grant CTS-0120978; and Oasys Water Inc. We also acknowledge the Graduate Fellowship (to Ngai Yin Yip) made by the Environment and Water Industrial Development Council of Singapore and the NWRI-AMTA Fellowship for membrane technology (to Alberto Tiraferri). Lastly, we thank Baoxia Mi and her research group at George Washington University for useful guidance on protocols for interfacial polymerization.
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Full metadata record

DC FieldValue Language
dc.contributor.authorYip, Ngai Yinen
dc.contributor.authorTiraferri, Albertoen
dc.contributor.authorPhillip, William A.en
dc.contributor.authorSchiffman, Jessica D.en
dc.contributor.authorHoover, Laura A.en
dc.contributor.authorKim, Yu Changen
dc.contributor.authorElimelech, Menachemen
dc.date.accessioned2016-02-28T06:34:17Zen
dc.date.available2016-02-28T06:34:17Zen
dc.date.issued2011-05-15en
dc.identifier.citationYip NY, Tiraferri A, Phillip WA, Schiffman JD, Hoover LA, et al. (2011) Thin-Film Composite Pressure Retarded Osmosis Membranes for Sustainable Power Generation from Salinity Gradients. Environ Sci Technol 45: 4360–4369. Available: http://dx.doi.org/10.1021/es104325z.en
dc.identifier.issn0013-936Xen
dc.identifier.issn1520-5851en
dc.identifier.pmid21491936en
dc.identifier.doi10.1021/es104325zen
dc.identifier.urihttp://hdl.handle.net/10754/600009en
dc.description.abstractPressure retarded osmosis has the potential to produce renewable energy from natural salinity gradients. This work presents the fabrication of thin-film composite membranes customized for high performance in pressure retarded osmosis. We also present the development of a theoretical model to predict the water flux in pressure retarded osmosis, from which we can predict the power density that can be achieved by a membrane. The model is the first to incorporate external concentration polarization, a performance limiting phenomenon that becomes significant for high-performance membranes. The fabricated membranes consist of a selective polyamide layer formed by interfacial polymerization on top of a polysulfone support layer made by phase separation. The highly porous support layer (structural parameter S = 349 μm), which minimizes internal concentration polarization, allows the transport properties of the active layer to be customized to enhance PRO performance. It is shown that a hand-cast membrane that balances permeability and selectivity (A = 5.81 L m-2 h-1 bar-1, B = 0.88 L m-2 h-1) is projected to achieve the highest potential peak power density of 10.0 W/m2 for a river water feed solution and seawater draw solution. The outstanding performance of this membrane is attributed to the high water permeability of the active layer, coupled with a moderate salt permeability and the ability of the support layer to suppress the undesirable accumulation of leaked salt in the porous support. Membranes with greater selectivity (i.e., lower salt permeability, B = 0.16 L m-2 h-1) suffered from a lower water permeability (A = 1.74 L m-2 h-1 bar-1) and would yield a lower peak power density of 6.1 W/m2, while membranes with a higher permeability and lower selectivity (A = 7.55 L m-2 h-1 bar-1, B = 5.45 L m-2 h-1) performed poorly due to severe reverse salt permeation, resulting in a similar projected peak power density of 6.1 W/m2. © 2011 American Chemical Society.en
dc.description.sponsorshipThis publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST); the WaterCAMPWS, a Science and Technology Center of Advanced Materials for the Purification of Water with Systems under the National Science Foundation Grant CTS-0120978; and Oasys Water Inc. We also acknowledge the Graduate Fellowship (to Ngai Yin Yip) made by the Environment and Water Industrial Development Council of Singapore and the NWRI-AMTA Fellowship for membrane technology (to Alberto Tiraferri). Lastly, we thank Baoxia Mi and her research group at George Washington University for useful guidance on protocols for interfacial polymerization.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleThin-Film Composite Pressure Retarded Osmosis Membranes for Sustainable Power Generation from Salinity Gradientsen
dc.typeArticleen
dc.identifier.journalEnvironmental Science & Technologyen
dc.contributor.institutionYale University, New Haven, United Statesen
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