Molecular sieve is developing in 1070, its main usage is adsorbent,  the carbon molecular sieve is a kind of  excellent carbon material without polarity. carbon molecular sieves can be used as separating nitrogen from air.
TO compare with cryogenic, PSA has some advantages: the investment is lower, start-up time is short: the cost for Nitrogen is lower. PSA Nitrogen generators apply in chemical, electronic, food, medical, metal heat treatment ets.  In dynamics, CMS has different adsorptive rate for oxygen and nitrogen. Before the adsorption balanced oxygen and other impurities are adsorbed by the MSC.

Application of Molecular Sieving Carbon (MSC) or Carbon Molecular Sieves (CMS)

Molecular Sieving Carbon is widely used for gas separation. One of the most typical applications is nitrogen PSA (Pressure Swing Adsorption). Nitrogen PSA is classified into the PSA system using velocity separation, which makes use of the difference of adsorption velocity between nitrogen and oxygen. The performance of PSA is largely affected by the property of Molecular Sieving Carbon. It is because the difference of molecular sizes is very small between oxygen compound (0.28nm×0.40nm) and nitrogen compound (0.30nm×0.41nm). The effective difference for the velocity separation can be obtained only when you use Molecular Sieving Carbon which uniform supermicro pores are highly controlled in figure 1. The best Molecular Sieving Carbon is precisely controlled so as to have slightly larger pores than nitrogen compound. This well control results in that the nitrogen compound is harder to adsorb and the oxygen compound is easier to adsorb. Japan EnviroChemicals, Ltd. has high-end technologies and know-how regarding pore controls.

Standard Grades of our Molecular Sieving Carbon (MSC) or Carbon Molecular Sieve (CMS)

	SHIRASAGI 3K-172	SHIRASAGI 3R-172
Pellet diameter	1.8mmφ	1.8mmφ
Particle size(%)	2.800-1.180mm 99.0% min.	2.360-1.000mm 99.0% min.
Half cycle time(sec)	60	60
Recovery(%)	37.0 min.	40.5 min.
Productivity(Nm3/hr.ton)	180 - 200	205 - 220