1. For the same adsorbed gas (adsorbate) in any adsorprtion, the lower temperature, the higher pressure and the larger adsorbing capacity
2. when absorption remains stable; otherwise, the higher temperature, the lower pressure and the smaller adsorbing capacity. If the temperature remains unchanged, desorption with decompression (vacuum pumping) or under normal pressure is called pressure swing adsorption (PSA) in the event of adsorption under compression.
3. As shown above, the size of adsorption of oxygen and nitrogen by carbon molecular sieve varies largely. Nitrogen and oxygen can be separated due to the size difference of oxygen and nitrogen adsorption from the air under some pressure. When the pressure rises,carbon molecular sieve adsorbs oxygen and generates nitrogen; when the pressure falls to normal, the sieve desorbs oxygen and regenerates nitrogen. Usually, the PSA nitrogen generator has two adsorbers, one of which adsorbs oxygen and produces nitrogen, and the other desorbs oxygen and regenerates nitrogen. In this way, nitrogen is produced continuously.