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Title: Identification of safe and stable operation conditions for pressure retarded osmosis with high performance hollow fiber membrane
Authors: Chen, Yunfeng
Setiawan, Laurentia
Chou, Shuren
Hu, Xiao
Wang, Rong
Keywords: Pressure retarded osmosis
Hollow fiber membrane
Membrane creeping
Stability test
Optimum working pressure
Issue Date: 2015
Source: Chen, Y., Setiawan, L., Chou, S., Hu, X., & Wang, R. (2016). Identification of safe and stable operation conditions for pressure retarded osmosis with high performance hollow fiber membrane. Journal of Membrane Science, 503, 90-100.
Series/Report no.: Journal of Membrane Science
Abstract: Pressure retarded osmosis (PRO) is a promising energy harvesting technique. However, when polymeric hollow fiber membrane is used for the PRO process, the mechanical strength of the membrane is a big concern. As hollow fiber membrane is self-supported and due to its polymeric nature, it may gradually deform over time under high pressure loading, or membrane "creeping" will occur. Current work is the first attempt to analyze the membrane creeping phenomenon of a novel thin film composite (TFC) hollow fiber. The membrane creeping was evaluated via nanoindentation by using atomic force microscope (AFM). A non-stop 200-hour PRO test and integrity check, which have not been reported previously, were carried out to investigate the membrane performance under various operating pressures. The results show that the membrane is able to produce a stable power density output of 19.2W/m2 at 15.0bar, using 1.0M NaCl as the draw solution and DI water as the feed water. Membrane creeping was observed when the applied pressure exceeded the safe operation limit (or the flux turning point, where the membrane flux started to increase with increasing applied pressure in the PRO mode), which caused an irreversible damage to the membranes. This study identified safe and optimum operation conditions of the laboratory-made PRO hollow fiber membrane to achieve the most favorable PRO performance. It provides guidance for practical applications of polymeric hollow fiber membranes in PRO process.
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2015.12.041
Rights: © 2015 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Membrane Science, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
MSE Journal Articles
NEWRI Journal Articles

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