|Oxygen Generator Capacity (Nm3/hr)||15 Nm3/Hr|
|Flow Rate(LPM)/(Nm3/Hr)||250 LPM / 15 Nm3/Hr|
|Air Compressor (kW)||30 kW|
|Technology Used||PSA(Pressure Swing Adsorption)|
|Purity Of Oxygen||93+-3%|
|No. of Cylinders Filled In A Day||55 Jumbo Cylinders in a Day|
Pressure swing adsorption processes utilize the fact that under high pressure, gases tend to be attracted to solid surfaces, or "adsorbed". The higher the pressure, the more gas is adsorbed. When the pressure is reduced, the gas is released, or desorbed. PSA processes can be used to separate gases in a mixture because different gases tend to be attracted to different solid surfaces more or less strongly. If a gas mixture such as air is passed under pressure through a vessel containing an adsorbent bed of zeolite that attracts nitrogen more strongly than oxygen, part or all of the nitrogen will stay in the bed, and the gas exiting the vessel will be richer in oxygen than the mixture entering. When the bed reaches the end of its capacity to adsorb nitrogen, it can be regenerated by reducing the pressure, thus releasing the adsorbed nitrogen. It is then ready for another cycle of producing oxygen-enriched air.
This is the process used in medical oxygen concentrators used by emphysema patients and others requiring oxygen-enriched air for breathing.
Using two adsorbent vessels allows near-continuous production of the target gas. It also permits so-called pressure equalisation, where the gas leaving the vessel being depressurised is used to partially pressurise the second vessel. This results in significant energy savings, and is common industrial practice.
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