Thin film composite hollow fiber membranes for osmotic power generation

a technology of osmotic power generation and thin film composite, which is applied in the direction of membranes, filtration separation, separation processes, etc., can solve the problems of adversely affecting the pwp rate, and achieve the effect of high water permeability rate and high pressur
US20160121533A1Inactive Publication Date: 2016-05-05NAT UNIV OF SINGAPORE
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
NAT UNIV OF SINGAPORE
Publication Date
2016-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

Disclosed is a thin film composite hollow fiber that includes an outer support layer having a thickness of 10 to 10000 μm and a polyamide thin film layer having a thickness of 1 to 10000 nm; and has a transmembrane pressure resistance rate of higher than 15 bar and a pure water permeability rate of higher than 0.8 Lm−2 h−1 bar−1. Also disclosed are methods of preparing the above-described support and composite hollow fiber.
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Description

BACKGROUND OF THE INVENTION

[0001] Pressure retarded osmosis (PRO) is a membrane-based separation process for harvesting osmotic power, a renewable marine resource.

[0002] In a typical PRO process, two solutions of different salinities, i.e., river water and seawater, are separated by a semi-permeable membrane. Osmotic power is generated as a result of a trans-membrane pressure, output of which is used to drive a pressurized stream to a hydro-turbine to generate electricity.

[0003] An ideal semi-permeable membrane used in a PRO process has both a high mechanical strength (i.e., capable of withstanding a high transmembrane pressure) and a high pure water permeability (PWP) rate. Yet, a higher mechanical strength typically requires a higher density or a greater thickness of the membrane, which adversely affects the PWP rate.

[0004] There is a need to develop a high-performance PRO membrane for use in exploiting osmotic power.SUMMARY OF THE INVENTION

[0005] This invention relates to a thin film ...

Claims

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