These plants incorporate membrane air separation modules.
The standard limiting purity grade (in a single-stage plant) of the product nitrogen is N2 concentration of 99,95 vol.%
Nitrogen membrane air separation plants
Operation of adsorption plants is based on selective absorption of air components by molecular adsorbents in the process of pressure swing adsorption.
The standard limiting purity grade (in a single-stage plant) of the product nitrogen is N2 concentration up to 99,999 vol.%