The PSA Technology (Pressure Swing Adsorption, referred to as PSA) is a kind of advanced gas separation technology with adsorbent (porous solids) internal surface physical adsorption based on gas molecular adsorbent, using separate gas for different gas absorption characteristics of different amount of under certain pressure.

Carbon molecular sieve is to achieve the separation of nitrogen and oxygen from the air to extract nitrogen adsorbent, the adsorption pressure at the same time, carbon molecular sieve oxygen adsorption capacity is much higher than the amount of nitrogen adsorption.

PSA nitrogen, also known as carbon molecular sieve nitrogen, is the use of this principle, using air as raw materials, using carbon molecular adsorbent, by pressure swing adsorption principle, selective adsorption of oxygen and nitrogen utilization of carbon, nitrogen and oxygen in the air to achieve separation, production of nitrogen.