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Experimental studies and modeling on concentration polarization in forward osmosis

(2010) WATER SCIENCE AND TECHNOLOGY. 61(11). p.2897-2904
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Abstract
Concentration polarization (CP) is an important issue in forward osmosis (FO) processes and it is believed that the coupled effect of dilutive internal CP (DICP) and concentrative external CP (CECP) limits FO flux. The objective of this study was to distinguish individual contribution of different types of DICP and CECP via modeling and to validate it by pilot studies. The influence of DICP/CECP on FO flux has been investigated in this study. The CP model presented in this work was derived from a previous study and evaluated by bench-scale FO experiments. Experiments were conducted with drinking water as the feed and NaCl/MgSO(4) as draw solutions at different concentrations and velocities. Modeling results indicated that DICP contributed to a flux reduction by 99.9% for 0.5 M NaCl as a draw solution although the flow pattern of both feed and draw solutions was turbulent. DICP could be improved via selection of the draw solution. The modeling results were well fit with the experimental data. It was concluded that the model could be used for selection of the draw solution and prediction of water flux under similar situation. A draw solution with greater diffusion coefficient or a thinner substrate of an asymmetric FO membrane resulted in a higher flux.
Keywords
concentration polarization, draw solution, forward osmosis, membrane flux, modelling, INTERNAL CONCENTRATION POLARIZATION, HOLLOW-FIBER MEMBRANES, PERFORMANCE, FLUX

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Chicago
Qin, Jian-Jun, Sijie Chen, Maung Htun Oo, Kiran A Kekre, Emile Cornelissen, and Chris J Ruiken. 2010. “Experimental Studies and Modeling on Concentration Polarization in Forward Osmosis.” Water Science and Technology 61 (11): 2897–2904.
APA
Qin, J.-J., Chen, S., Oo, M. H., Kekre, K. A., Cornelissen, E., & Ruiken, C. J. (2010). Experimental studies and modeling on concentration polarization in forward osmosis. WATER SCIENCE AND TECHNOLOGY, 61(11), 2897–2904.
Vancouver
1.
Qin J-J, Chen S, Oo MH, Kekre KA, Cornelissen E, Ruiken CJ. Experimental studies and modeling on concentration polarization in forward osmosis. WATER SCIENCE AND TECHNOLOGY. 2010;61(11):2897–904.
MLA
Qin, Jian-Jun, Sijie Chen, Maung Htun Oo, et al. “Experimental Studies and Modeling on Concentration Polarization in Forward Osmosis.” WATER SCIENCE AND TECHNOLOGY 61.11 (2010): 2897–2904. Print.
@article{8557111,
  abstract     = {Concentration polarization (CP) is an important issue in forward osmosis (FO) processes and it is believed that the coupled effect of dilutive internal CP (DICP) and concentrative external CP (CECP) limits FO flux. The objective of this study was to distinguish individual contribution of different types of DICP and CECP via modeling and to validate it by pilot studies. The influence of DICP/CECP on FO flux has been investigated in this study. The CP model presented in this work was derived from a previous study and evaluated by bench-scale FO experiments. Experiments were conducted with drinking water as the feed and NaCl/MgSO(4) as draw solutions at different concentrations and velocities. Modeling results indicated that DICP contributed to a flux reduction by 99.9\% for 0.5 M NaCl as a draw solution although the flow pattern of both feed and draw solutions was turbulent. DICP could be improved via selection of the draw solution. The modeling results were well fit with the experimental data. It was concluded that the model could be used for selection of the draw solution and prediction of water flux under similar situation. A draw solution with greater diffusion coefficient or a thinner substrate of an asymmetric FO membrane resulted in a higher flux.},
  author       = {Qin, Jian-Jun and Chen, Sijie and Oo, Maung Htun and Kekre, Kiran A and Cornelissen, Emile and Ruiken, Chris J},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {concentration polarization,draw solution,forward osmosis,membrane flux,modelling,INTERNAL CONCENTRATION POLARIZATION,HOLLOW-FIBER MEMBRANES,PERFORMANCE,FLUX},
  language     = {eng},
  number       = {11},
  pages        = {2897--2904},
  title        = {Experimental studies and modeling on concentration polarization in forward osmosis},
  url          = {http://dx.doi.org/10.2166/wst.2010.078},
  volume       = {61},
  year         = {2010},
}

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