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The Pressure Swing Adsorption (PSA) Oxygen
Generating Process Air contains 21% oxygen, 78% nitrogen, 0.9% argon,
and 0.1% other gases. AirSep Oxygen Generating Systems separate oxygen
from compressed air through a unique Pressure Swing Adsorption (PSA)
process. The PSA process uses molecular sieve (a synthetic zeolite),
which attracts (adsorbs) nitrogen from air at high pressure and releases
(desorbs) it at low pressure. AirSep Oxygen Generators use vessels
filled with molecular sieve as adsorbers. As compressed feed air flows
through one of the vessels, the molecular sieve adsorbs nitrogen. The
remaining oxygen passes through the vessel and exits as the product gas.
Before the adsorber becomes saturated with nitrogen, the feed air is
diverted to another vessel. At that point, the sieve in the first vessel
regener-ates by desorbing the nitrogen through depressurization and
purging it with oxygen from the other vessel. This process is then
repeated to allow the oxygen generator to deliver a constant flow of
product oxygen at 90% minimum purity. Under normal operat-ing
conditions, the molecular sieve is completely regenerative and will last
indefinitely. AirSep offers a wide variety of standard PSA oxygen
systems to supply virtually any oxygen application from 12–5,000 SCF/hr
(0.32–131 Nm3/hr) of product oxygen output. AirSep also designs and
constructs larger engineered systems. |
