Please check below chart of CMS adsorb under different pressure of O2 and N2
Pressure swing adsorption (PSA) is an advanced gas separate technique,it is widely used in gas supply field in the world.
Adsorption: When air inlet adsorption tower,during the pressure function,O2 and CO2 be adsorbed quickly.Formed N2 near the outlet position.
PSA means Pressure Swing adsorption . As we know there are about 21% oxygen and 78% Nitrogen in the compressed air .