An oxygen concentrator is a device that concentrates the oxygen from a gas supply by selectively removing nitrogen to supply an oxygen-enriched product gas stream. They are used industrially, to provide supplemental oxygen at high altitudes, and as medical devices for oxygen therapy.
Modern Fritz Stephan GmbH multi molecular sieve oxygen concentrator
Membrane cartridge
A home oxygen concentrator in an emphysema patient's house. The model shown is the DeVILBISS LT 4000.
Philips Respironics Home Oxygen Concentrator.
Pressure swing adsorption
Pressure swing adsorption (PSA) is a technique used to separate some gas species from a mixture of gases under pressure according to the species' molecular characteristics and affinity for an adsorbent material. It operates at near-ambient temperature and significantly differs from the cryogenic distillation commonly used to separate gases. Selective adsorbent materials are used as trapping material, preferentially adsorbing the target gas species at high pressure. The process then swings to low pressure to desorb the adsorbed gas.
Gas separator membrane skid used in landfill gas utilization process