Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/160375
Title: A novel method for the accurate characterization of transport and structural parameters of deformable membranes utilized in pressure- and osmotically driven membrane processes
Authors: Peters, Christian D.
Ng, Daniel Yee Fan
Hankins, Nicholas P.
She, Qianhong
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Peters, C. D., Ng, D. Y. F., Hankins, N. P. & She, Q. (2021). A novel method for the accurate characterization of transport and structural parameters of deformable membranes utilized in pressure- and osmotically driven membrane processes. Journal of Membrane Science, 638, 119720-. https://dx.doi.org/10.1016/j.memsci.2021.119720
Project: 002195- 00001
Journal: Journal of Membrane Science
Abstract: Membrane deformation is a common phenomenon in pressurized membrane processes. It alters the transport and structural characteristics of membranes and hence can lead to a lower than estimated process performance. Therefore, it is essential to accurately characterize the membrane under representative operating conditions. This will allow for both an understanding of the underlying mechanisms for the change of membrane performance, and an optimization of the design and operation of pressure- and osmotically driven membrane processes. A novel membrane characterization method is proposed, validated and tested in this study. Using the osmotic-resistance filtration model, the membrane's water and solute permeability (A and B), as well as its structural parameter S, can be accurately determined using the method. The method is named the integrated two-stage (ITS) ABS method, as the membrane can be fully characterized at any given pressure using a single continuous test that is divided into two stages; each stage uses a different feed or draw concentration. A, B and S are calculated from the experimentally determined water and solute fluxes by performing a least-squares non-linear regression. The proposed method is robust, simple and offers more accurate predictions of the membrane's transport and structural properties than the currently most widely used reverse osmosis–forward osmosis (RO–FO) characterization method.
URI: https://hdl.handle.net/10356/160375
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2021.119720
Schools: School of Civil and Environmental Engineering 
Research Centres: Singapore Membrane Technology Centre 
Nanyang Environment and Water Research Institute 
Rights: © 2021 Published by Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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