Natural Science Forum / Chemistry / Organic Synthesis / July 2005

I am trying to do some gas separation work on a small scale package
synthisis plant and I have noted that medical oxigen concentrators seem
to be very common and relativly reasonably priced since I'm trying to
seperate hydrogen from nitrogen I figure the process should work quite
well but I'm having trouble naming the process so I can search for the
right materials, I always assumed the process was simple diffusion but
is that what's really going on here?