Air contains approximately 21% oxygen, 78% nitrogen, 0.9% argon, and 0.1% other gases. AirSep Oxygen Systems separate this small percentage of oxygen from compressed air through a unique non-cryogenic process. Both the PSA and VPSA processes use molecular sieve (a synthetic zeolite), which attracts (adsorbs) nitrogen from air at high pressure and releases (desorbs) it at low pressure.
AirSep Oxygen Concentrators, Generators, and Oxygen Plants use at least two vessels filled with molecular sieve as adsorbers. As compressed or pressurized air passes through one of the adsorbers, the molecular sieve adsorbs the nitrogen. This allows the remaining oxygen to pass through and exit the adsorber as a product gas. Before the adsorber becomes saturated with nitrogen, the inlet air flow switches to the next adsorber. The first adsorber is now regenerated by desorbing the nitrogen through depressurization back to the atmosphere, followed by an oxygen purge step. The complete cycle then repeats.
The Vacuum Pressure Swing Adsorption (VPSA) process further aids the regeneration or desorption step utilizing a vacuum blower.
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