Scaling resistance by fluoro-treatments: The importance of wetting states

2022 ◽  
Author(s):  
Li Liu ◽  
Laura Charlton ◽  
Yanqing Song ◽  
Tao Li ◽  
Xue-Mei Li ◽  
...  
Keyword(s):  
High Salinity ◽  
Membrane Distillation ◽  
Separation Process ◽  
Porous Membranes ◽  
Thermally Driven ◽  
Scaling Resistance

Membrane distillation is a thermally driven separation process using hydrophobic, porous membranes. Among various problems faced by membrane distillation, scaling remains an unresolved challenge in treating streams of high salinity....

scholarly journals Capillary Polypropylene Membranes for Membrane Distillation

Fibers ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Marek Gryta
Keyword(s):  
Continuous Process ◽  
Negative Influence ◽  
Membrane Distillation ◽  
Water Desalination ◽  
Porous Membranes ◽  
Surface Porosity ◽  
Permeate Flux ◽  
Thermally Induced

Only nonwetted porous membranes can be used in membrane distillation. The possibility of application in this process the capillary polypropylene membranes manufactured by thermally-induced phase separation was studied. The performance of a few types of membranes available commercially was presented. The resistance of the membranes to wetting was tested in the continuous process of water desalination. These studies were carried out for 1000 h without module cleaning. The presence of scaling layer on the membranes surface was confirmed by Scanning Electron Microscope observations. Both the permeate flux and distillate conductivity were almost not varied after the studied period of time, what indicates that the used membranes maintained their nonwettability, and the negative influence of scaling was limited. The role of surface porosity on the pore wetting and influence of membrane wettability on the quality of the distillate obtained were discussed.

A framework for better understanding membrane distillation separation process

2006 ◽  
Vol 285 (1-2) ◽  
pp. 4-29 ◽  
Author(s):  
M.S. El-Bourawi ◽  
Z. Ding ◽  
R. Ma ◽  
M. Khayet
Keyword(s):  
Membrane Distillation ◽  
Separation Process

Scaling sets the limits of large scale membrane distillation modules for the treatment of high salinity feeds

2021 ◽  
Vol 287 ◽  
pp. 125555
Author(s):  
Sofiane Soukane ◽  
Harun Elcik ◽  
Alla Alpatova ◽  
Jamel Orfi ◽  
Emad Ali ◽  
...  
Keyword(s):  
Large Scale ◽  
High Salinity ◽  
Membrane Distillation

Recent Progress in Membrane Distillation

2014 ◽  
Vol 70 (2) ◽  
Author(s):  
K. C. Chong ◽  
S. O. Lai
Keyword(s):  
Renewable Energy ◽  
Recent Progress ◽  
Membrane Separation ◽  
Waste Heat ◽  
Rejection Rate ◽  
Porous Membrane ◽  
Membrane Distillation ◽  
Separation Process ◽  
Membrane Fabrication ◽  
The 1960S

Membrane distillation (MD) is an emerging membrane separation technique which provides a competition for the conventional separation process such as reverse osmosis (RO) and thermal distillation. The MD process was first developed in the 1960s, but only recently garnered the interest from academics and industry due to the advancement of membrane fabrication technique. The MD is a thermal-driven process which has an ability to be integrated with renewable energy and/or waste heat. The driving force of the MD process is vapor pressure difference where the feed vapor is transported through the non-wetted hydrophobic porous membrane to the permeate regime where permeate will be collected via condensation. As such, the MD possesses a theoretical rejection rate of nearly 100%. This review addressed the recent progress of the MD process in terms of membrane fabrication, integration with renewable energy and/or other membrane separation process as well as applications of MD in various industries. This paper may serve as an update of the recent progress of MD which in some way, is able to help the researchers explore the new investigation field in MD for it to be commercially more viable.

scholarly journals A Review of Membrane Distillation Process: Before, During and After Testing

2019 ◽  
Vol 6 (1) ◽  
pp. 62-81
Author(s):  
N.A.S. Muhamad ◽  
Nadzirah Mohd Mokhtar ◽  
R. Naim ◽  
W.J. Lau ◽  
A.F. Ismail
Keyword(s):  
Membrane Fouling ◽  
Treatment Process ◽  
Membrane Distillation ◽  
Separation And Purification ◽  
Hydrophobic Membrane ◽  
Major Drawback ◽  
Membrane Performance ◽  
Membrane Surfaces ◽  
Thermally Driven ◽  
Pass Through

Membrane Distillation (MD) is a promising technology for separation and purification processes. It is a thermally-driven separation process which allow only vapour molecules are to pass through a porous hydrophobic membrane. MD separation is driven by the vapour pressure difference existing between the porous hydrophobic membrane surfaces unlike normal membrane processes which operate on temperature difference. This paper focus on the expectation of MD treatment process primarily for the readers who have no idea about this membrane process A brief overview is given of MD before treatment process which includes membrane materials, membrane preparation techniques, membrane characteristics, module and configuration. Membrane performance during treatment process will be highlighted. Membrane fouling which is one of the major drawback of MD will be also discussed.

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