Membrane PSA: [Weekly Topic] {March 14, 2011} Why has MD not seen widespread industrial application? What are the main reasons?
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This post was last edited by Kongfen Zhulong on 2011-3-14 at 14:03. Membrane distillation (MD) is a membrane separation technology that has been the subject of extensive research; it combines the principles of distillation processes with those of membrane processes. The MD process features simple equipment and low investment, and it can make use of various low-grade heat sources such as industrial waste heat, solar energy, and geothermal energy. But why has MD not yet been widely applied in industry to date? What are the main reasons?
The cost of producing such membranes is relatively high; the membranes are hydrophobic and have low flux； Compared to existing technologies, its advantages in terms of overall energy consumption and production capacity still need to be improved
I believe that membrane distillation will see a certain amount of application in the coming years. A breakthrough will be found in the utilization of waste heat steam. Our company is already ready to take action in this area.
I used the PP membrane produced by my own company for membrane distillation; since this was my first attempt, the performance wasn’t good, with a flux of only 1.5 L/m2·h. The desalination rate is quite good, over 99.9%.
Reply to 4# zgkingf: Yes, I have also used PP film before, and the flux was just as high. When I used PVDF membranes, I achieved 25-30 LMH under the same conditions, which is more than ten times higher.
Reply to 5# Benjamin315: It’s still a problem with the membrane itself!
Reply to 6# zgkingf: What I want to mention to everyone is that I prepared this PVDF membrane myself. We will soon start mass-producing these membrane distillation membranes. In Xiamen.
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Targeted membrane research and development plays a decisive role in advancing the application of membrane technology in industrial fields. At present, the entire industry using these membranes is cautious regarding their lifespan and subsequent costs; only those projects that can yield immediate benefits are being pursued by companies that have already adopted such technologies. Widespread adoption requires membrane technology to keep up with advances
Our company is currently using membrane separation to separate nitrogen from propylene; I’m not sure what the results are
With the advancement of materials science and the resulting reduction in membrane costs, it is believed that MD will be widely applied in the near future.