Next Article in Journal
The Bacteriostatic Activity of 2-Phenylethanol Derivatives Correlates with Membrane Binding Affinity
Previous Article in Journal
Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process
Previous Article in Special Issue
A Unified, One Fluid Model for the Drag of Fluid and Solid Dispersals by Permeate Flux towards a Membrane Surface
Article

The Effect of the Oleophobicity Deterioration of a Membrane Surface on Its Rejection Capacity: A Computational Fluid Dynamics Study

1
Process System Engineering, University of Regina, Regina, SK S4S 0A2, Canada
2
Reactors Depart., Nuclear Research Center, Atomic Energy Authority, Cairo 13759, Egypt
3
Energy Research Lab., College of Engineering, Effat University, Jeddah 22332, Saudi Arabia
4
Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
5
Mechanical Engineering Department, University of Tripoli, Tripoli 13275, Libya
*
Author to whom correspondence should be addressed.
Academic Editor: Xuezhong He
Membranes 2021, 11(4), 253; https://doi.org/10.3390/membranes11040253
Received: 28 February 2021 / Revised: 21 March 2021 / Accepted: 25 March 2021 / Published: 31 March 2021
In this work, the effects of the deteriorating affinity-related properties of membranes due to leaching and erosion on their rejection capacity were studied via computational fluid dynamics (CFD). The function of affinity-enhancing agents is to modify the wettability state of the surface of a membrane for dispersed droplets. The wettability conditions can be identified by the contact angle a droplet makes with the surface of the membrane upon pinning. For the filtration of fluid emulsions, it is generally required that the surface of the membrane is nonwetting for the dispersed droplets such that the interfaces that are formed at the pore openings provide the membrane with a criterion for the rejection of dispersals. Since materials that make up the membrane do not necessarily possess the required affinity, it is customary to change it by adding affinity-enhancing agents to the base material forming the membrane. The bonding and stability of these materials can be compromised during the lifespan of a membrane due to leaching and erosion (in crossflow filtration), leading to a deterioration of the rejection capacity of the membrane. In order to investigate how a decrease in the contact angle can lead to the permeation of droplets that would otherwise get rejected, a CFD study was conducted. In the CFD study, a droplet was released in a crossflow field that involved a pore opening and the contact angle was considered to decrease with time as a consequence of the leaching of affinity-enhancing agents. The CFD analysis revealed that the decrease in the contact angle resulted in the droplet spreading over the surface more. Furthermore, the interface that was formed at the entrance of the pore opening flattened as the contact angle decreased, leading the interface to advance more inside the pore. The droplet continued to pass over the pore opening until the contact angle reached a certain value, at which point, the droplet became pinned at the pore opening. View Full-Text
Keywords: oily water filtration; membrane technology; contact angle; multicontinuum approach; CFD oily water filtration; membrane technology; contact angle; multicontinuum approach; CFD
Show Figures

Figure 1

MDPI and ACS Style

Salama, A.; Alyan, A.; El Amin, M.; Sun, S.; Zhang, T.; Zoubeik, M. The Effect of the Oleophobicity Deterioration of a Membrane Surface on Its Rejection Capacity: A Computational Fluid Dynamics Study. Membranes 2021, 11, 253. https://doi.org/10.3390/membranes11040253

AMA Style

Salama A, Alyan A, El Amin M, Sun S, Zhang T, Zoubeik M. The Effect of the Oleophobicity Deterioration of a Membrane Surface on Its Rejection Capacity: A Computational Fluid Dynamics Study. Membranes. 2021; 11(4):253. https://doi.org/10.3390/membranes11040253

Chicago/Turabian Style

Salama, Amgad, Adel Alyan, Mohamed El Amin, Shuyu Sun, Tao Zhang, and Mohamed Zoubeik. 2021. "The Effect of the Oleophobicity Deterioration of a Membrane Surface on Its Rejection Capacity: A Computational Fluid Dynamics Study" Membranes 11, no. 4: 253. https://doi.org/10.3390/membranes11040253

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop