In the process of adsorbing impurity gases on molecular sieves, macropores and mesopores only serve as channels, sending the adsorbed molecules into micropores and sub micropores, where the true adsorption occurs. The interior of carbon molecular sieve is filled with numerous micropores, which allow molecules with small kinetic sizes to rapidly diffuse into the pores while restricting the entry of larger diameter molecules. The diffusion rate of gas molecules of different sizes varies, resulting in effective separation of mixed gas components. Therefore, when manufacturing carbon molecular sieves, the pore size should be 0.28-0.38nm to accommodate the rapid diffusion of oxygen into the pores through the micropores, while nitrogen is difficult to pass through the micropores, achieving oxygen and nitrogen separation. The micropore size is the basis for the separation of oxygen and nitrogen in carbon molecular sieves, and whether the pore size is too large or too small affects the separation efficiency


The particle size of carbon molecular sieve is about 1mm, and the pile density of cylindrical black particles is 630~680kg/m3. The nitrogen produced is divided into CMS-240, CMS-260, CMS280, CMS300, CMS330, CMS350, CMS380, CMS400