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Gas Dehumidification

Air/Gas Dehumidification using PermSelect® Membrane Gas DryerAir/Gas Dehumidification using PermSelect® Membrane Gas Dryer

Gas stream dehumidification or gas drying using PermSelect® membrane gas dryers can be accomplished very quickly and easily. Our silicone membrane gas dryers can be used effectively to dehumidify your gas stream in a simple and compact membrane dehumidification system. Because silicone membranes are highly permeable to water vapor they are very efficient in transferring moisture out of gas streams while preserving other gases substantially intact.

How do I dehumidify my gas stream? Gas stream dehumidification using PermSelect® membrane gas dryers is achieved as illustrated in the figure above where the humid gas stream is supplied to a port at one end cap of the membrane gas dryer. As the humid gas flows through the lumens of the membrane dryer, water vapor is transferred across the membrane driven by the higher partial pressure of the water vapor in the humid gas stream compared to the water vapor pressure outside the hollow fibers (shell side). A sweep gas or a vacuum can be used to remove the extracted moisture from the shell side as illustrated below. Alternatively, if the gas is supplied compressed, the extracted moisture can be simply vented to the atmosphere.

There are many advantages to using a PermSelect® membrane dehumidification system to dehumidify your gas stream compared to using conventional gas dehumidification methods such as cold traps and desiccant dehumidifier systems:

  • Maintenance-free membrane dehumidification system
  • No moving parts compared to refrigerant or regenerating desiccant dehumidifiers
  • No CFC gas and no refrigerant needed to dehumidify
  • No desiccant needed so there is no need to replace or regenerate desiccants
  • Compact and lightweight dehumidification system
  • Can passively de-moisturize compressed air by using hollow fiber membranes
  • No power source is required and no heat is discharged
  • Generates no liquid drain because moisture is removed as vapor
  • Easy installation
  • Quiet continuous operation
  • Environmentally friendly

View a short video demonstrating how to use a PermSelect membrane module
to dehumidify your gas stream.

Contact an applications engineer, or call +1 (734) 769-1066 to discuss your particular air/gas dehumidification needs. MedArray provides its PermSelect® membrane modules for gas dehumidification directly to researchers, and to industry through original equipment manufacturers (OEM’s) who are interested in integrating dehumidification solutions in their equipment. We can also customize membrane modules to your specific application. Contact us to discuss your custom application.