In the atmosphere, almost 78% is nitrogen (N2) and close to about 21% oxygen (O2) is present. To obtain nitrogen from the air, PSA technology is used by different industries depending on their requirements. Carbon molecular sieves are the core part of pressure swing adsorption (PSA) systems. CMS can be used to generate nitrogen due to its high affinity and ability to adsorb oxygen molecules.
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The compressed air from the compressor is pressurized and enters the CMS bed tower. The tower is filled with CMS and has a cavernous structure. Also due to its special affinity for oxygen molecules, nitrogen is not adsorbed by CMS. Therefore, nitrogen-rich air can be received as output. Once this tower and CMS reach its saturation level, the air is bypassed to the second tower. Now the second tower will receive pressurized air. During this process, the previous column will act as desorption mode. This can be accomplished by releasing stress. The adsorbed oxygen molecules will therefore be desorbed. The process is also carried out by supplying pure nitrogen as purge. This adsorption and desorption will produce nitrogen as output. During the desorption process, oxygen is expelled so the CMS bed is ready for the next adsorption cycle. Therefore, carbon molecular sieves (CMS) play a very important role in the nitrogen generation process.
Post time: Nov-07-2020
