Carbon molecular sieve is a new kind of adsorbent, which is an excellent non-polar carbon material. It is mainly composed of elemental carbon and appears as a black columnar solid. Carbon molecular sieve contains a large number of micropores, these micropores on the instantaneous affinity of oxygen molecules is strong, can be used to separate O2 and N2 in the air. In industry, pressure swing adsorption device (PSA) is used to make nitrogen. Carbon molecular sieve has the characteristics of strong nitrogen generating capacity, high nitrogen recovery rate and long service life. It’s suitable for various types of pressure swing adsorption nitrogen generator.