Many methods have been developed in producing high-purity industrial gas such as oxygen, nitrogen, hydrogen, carbon monoxide and so on. With the characteristics of high absorption selectivity and high absorption capacity, the molecular sieve plays a significant role in their manufacturing processes.

Molecular sieve is used in air separation by cryogenic distillation and adsorption process to produce high purity O2 and N2. In the normal cryogenic process, compressed and cooled air passes through the molecular sieve bed, in which water and CO2 content will be adsorbed to below 1 ppm, thereby effectively preventing the downstream equipment from freezing and blocking when O2 and N2 process the cryogenic separation. Shanghai TOP 13X-APG II and 13X-APG III products are suitable for this application. Using high CO2 capacity molecular sieve in this process, it will not only reduce the quantity of molecular sieve and the initial equipment investment, but also will reduce the regeneration energy consumption and the daily expense, to achieve a low carbon economy. The high performance molecular sieves provided by Shanghai TOP include T10-HPG and T10-XPG series products. 

For the composed beds process using molecular sieve and activated alumina, Shanghai TOP is also able to provide the high capacity AA-201 series activated alumina products. At the same time the N2O in the air is more difficult to be removed by common 13X molecular sieve, therefore the N2O is easy to enrich in the cold box, thus resulting in a potential explosion hazard. Shanghai TOP developed the T09-NPG product to remove N2O specially, which solved the problems that have troubled the air separation industry for long time.

High purity of O2 and N2 also can be produced by pressure swing adsorption method, namely molecular sieve adsorbs N2 thus leaves O2 in the remaining gas stream, this process is mainly used in metal smelting and paper making industries. In practice, one or several adsorbent beds are in the adsorption state, which removes moisture, CO2 and N2 from the air thus gets the high purity O2, meanwhile the other beds are in the regeneration state by de-pressure method. Shanghai TOP can provide T08-HP & T08-XP (high performance) products for the PSA process, and T05-VSP & T08-VP (high performance) products for the VPSA process.