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Applications for Silicone Hollow Fiber Membrane Modules and Membrane Contactors

Click Here to download our whitepaper "Using Membranes for Gas Exchange." (PDF)

Liquid Contacting
Liquid contacting is the use of membrane modules and membrane contactors for the transfer of gases to and from liquids. PermSelect® membranes contactors are comprised of dense silicone membranes, without pores to clog, and which cannot leak (or "wet") as porous membranes can. Other advantages of PermSelect® silicone membranes over polypropylene micro-porous membranes are:

  • UV resistance
  • high temperature resistance (autoclavable)
  • chemical resistance to bleach
  • ozone and other oxidizing chemical resistance
  • fouling resistance

This Quick Setup Guide and Detail Guidelines illustrate how to arrange membrane modules and membrane contactors for liquid contacting applications. PermSelect® membrane modules can also be used to transfer gases and vapors between liquids in liquid-liquid membrane contacting applications. Below is a list of liquid contacting applications suitable for PermSelect® membrane modules.

Pervaporation
Pervaporation is a membrane separation process that typically uses a vacuum to facilitate the transfer of a vaporizing compound through the PermSelect® membrane. It is most often used to separate liquids that have similar boiling points but different rates of transfer through the membrane material.

Gas Separation
Gas separation is accomplished by a PermSelect® membrane due to the differences among gases in their ability to permeate through the silicone membrane (not based on their molecular sizes). The driving force of the gas transfer is the gas partial pressure differential across the membrane.