there is need to Helium be separated from Argon in some processes .
Dewar method: adsorption of Ar by charcoal @ 173 K, He stays unadsorbed.
Sure, adsorption by charcoal/zeolite with a Liq N2 trap is a standard method we use in noble gas mass spectrometry.
Commercially probably the best way is by PSA(Pressure Swing Adsorption0 using activated carbon or a molecular sieve. There is no need for low temperature
there are two ways of doing this:
PSA - which is a non-cryogenic process uses an adsorbent bed which selectively attracts contaminants from condensed crude helium to produce helium that's at least 99.997 percent
Cryogenic process - the crude helium is compressed and cooled before nitrogen is condensed and removed. The helium gas then passes through activated charcoal for final purification.
Yes, a PSA process is a continuous one and 130 SLM should not be a problem at all. You won't need very large beds.
There exist a great variety of membrate separation processes. For example, helium permeates thin walls produced from glass more quickly than argon. One of the best constructions of membrane facility is bundle of hollow fibers.
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