Membrane Separation
This membrane separation equipment was donated by Praxair, Inc. to Michigan Tech in 2001. This unit separates air into a nitrogen rich and an oxygen rich stream using a membrane that contains hollow tubes. The oxygen rich stream preferentially penetrates through the hollow tube and the nitrogen rich stream preferentially remains outside the hollow tube. Pressures and flow rates are varied to determine the optimum operating conditions.
http://www2.cheme.cmu.edu/course/06302/airsep2/
http://www2.cheme.cmu.edu/course/06302/airsep2/membrane/membrane.htm
http://www.tifac.org.in/news/memb.htm