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ADSOSS™-O plants produce oxygen by means of adsorption. While nitrogen, carbon dioxide and water vapor are readily adsorbed by the surface of the special zeolites, oxygen and argon easily pass through this material. The zeolite is regenerated by reducing the pressure via vacuum. ADSOSS-O systems are typically designed with the two adsorber vessels. To produce oxygen, the vessels are cyclically operated. This is referred to as vacuum pressure swing adsorption (VPSA).
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