Concentration polarization effect and preferable membrane configuration at pressure-retarded osmosis operation

Nguyen, Thi Phuong Nga; Jun, Byung-Moon; Park, Hyung Gyu; Han, Sangwoo; Kim, Yu‐Kyung; Lee, Hyung Kae; Kwon, Young‐Nam

doi:10.1016/j.desal.2016.02.028

Cited by 17 publications

(4 citation statements)

References 23 publications

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“…In both cases, the drop across the feed side boundary layer is negligible and can be ignored, as has been suggested elsewhere [26]. The results also confirm that polarisation is minimised when the active layer is oriented toward the draw solution [27]. In case (a) the concentration difference Δ c = 22.8 g/l, whereas in case (b) it is only Δ c = 17.2 g/l.…”

Section: Effects Of Concentration Polarisation On Powersupporting

confidence: 80%

Introduction to PRO for energy conversion applications including an electric equivalent circuit

Maisonneuve

Pillay

2016

IET Renewable Power Generation

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Pressure retarded osmosis (PRO) is a renewable energy conversion process with potential for sustainable power production. This study introduces this resource to the electrical engineering community and presents the first electric equivalent circuit of the process. This provides a useful tool for integrated osmotic power plant analysis and design. The model illustrates the influence of several important non‐ideal effects on power output including concentration polarisation, spatial variation, and pressure drop. The dynamic influence of salt storage by water is also considered. The influence of feed and draw input currents and hydraulic load on power output are investigated and suggest that there is some operating point that will yield maximum power. This illustrates the need for maximum power point tracking in PRO energy conversion.

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Section: Effects Of Concentration Polarisation On Powersupporting

confidence: 80%

Introduction to PRO for energy conversion applications including an electric equivalent circuit

Maisonneuve

Pillay

2016

IET Renewable Power Generation

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“…In brief, a membrane coupon with 15 cm 2 effective area was firstly compacted at 10 bars for 1 h, and stabilized at 5 bars for 30 min, followed by the permeability measurement of membrane samples. The concentrations of NaCl/MgSO 4 , dyes, and PEGs were measured using a calibrated conductivity meter (Accumet Excel XL30, Thermo Scientific, Waltham, MA, USA), an ultraviolet-visible spectrophotometer (Agilent Technologies, Santa Clara, CA, USA), and a total organic carbon analyzer (TOC-V CSN analyzer; Shimadzu, Kyoto, Japan), respectively [30]. The concentrations of the four different dyes were obtained at their respective maximal adsorption wavelength [7].…”

Section: Membrane Performancesmentioning

confidence: 99%

Post-Treatment of Nanofiltration Polyamide Membrane through Alkali-Catalyzed Hydrolysis to Treat Dyes in Model Wastewater

Jun

Yoon

Park

2019

Water

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This research focused on the influence of post-treatment using alkali-catalyzed hydrolysis with a full-aromatic nanofiltration (NF) polyamide membrane and its application to the efficient removal of selected dyes. The post-treated membranes were characterized through Fourier transform infrared spectroscopy, goniometry, and zeta-potential analysis to analyze the treatment-induced changes in the intrinsic properties of the membrane. Furthermore, the changes in permeability induced by the post-treatment were evaluated via the measurement of water flux, NaCl rejection, and molecular weight cutoff (MWCO) under different pH conditions and post-treatment times. Major changes induced by the post-treatment in terms of physicochemical properties were the enhancement of permeability, hydrophilicity, and negative charge due to the hydrolysis of the membrane’s amide bonds. Four different dyes were selected as representative organic pollutants considering the MWCO of the post-treated membranes. Compared with the pristine NF membrane, membranes post-treated at pH 13.5 showed better water flux with similar rejection of the target dyes. On the basis of these results, the proposed post-treatment method for NF membranes can be applied to the removal of organic pollutants of various size.

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“…Therefore, for long-term PRO operation, one must combine both membrane modifications and efficient cleaning methods to ensure sustainable operation. However, there are limited relevant studies [14,[40][41][42][43] reported on cleaning procedures and methods. 4 To rejuvenate and maintain the anti-fouling properties of modified membranes for osmotic power generation, the objectives of this study are to determine the effective cleaning methods for anti-fouling membranes using the CHPG-TFC membrane as an example and to reveal the mechanisms behind the chemical cleaning.…”

Section: Introductionmentioning

confidence: 99%

Cleaning strategies and membrane flux recovery on anti-fouling membranes for pressure retarded osmosis

Xue

Cai

Amy

et al. 2017

Journal of Membrane Science

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Concentration polarization effect and preferable membrane configuration at pressure-retarded osmosis operation

Cited by 17 publications

References 23 publications

Introduction to PRO for energy conversion applications including an electric equivalent circuit

Introduction to PRO for energy conversion applications including an electric equivalent circuit

Post-Treatment of Nanofiltration Polyamide Membrane through Alkali-Catalyzed Hydrolysis to Treat Dyes in Model Wastewater

Cleaning strategies and membrane flux recovery on anti-fouling membranes for pressure retarded osmosis

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