There are two types of oxygen concentrators: home and portable. As the name suggests, the home devices use the electricity supply available from the patient's home. It simply plugs into a wall socket.

The packed column used for the separation of distillation is a vertical cylindrical vessel containing an appropriate packing bed supported and irrigated by the liquid flowing through a particular distributor. The bed height is determined by the packing mass transfers capacity and constrained are governed by allowable pressure drop and the overall column height.

An air dryer for removing water vapor from compressed air. Air compression concentrates the water vapor, which increases the dew point of the compressed air relative to the free atmosphere and causes condensation inside the pipe.

Most new air separation plants use "molecular sieves" and "pre-purification units" (PPU) to remove carbon dioxide by adsorbing these molecules to the surface of the "molecular sieve" material by adsorbing them at near ambient temperature.

PSA technical(Pressure Swing Adsorption,PSA for short) :it’s a kind of afvanced gas separation technology,based on physical adsorption of gas molecule on the internal surface of adsorbent(porous solid substances),using adsorbents in the same pressure easy to absorb the high boiling point gas,difficult to absorb low boiling point gas.amd under high pressure adsorption amount of absorbed gas increases,under low pressure adsorption of absorbed gas to reduce the features to achieve gas separation.