Pressure Swing Adsorption (PSA)
The process of the Pressure Swing Adsorption (PSA) Technology is an extremely clean operation. The only ‘raw material’ is air.
Oxymat on-site oxygen and nitrogen generators allow for an uninterrupted supply of gas with a high purity output. This means that you can produce gas where and when you need it, and in the exact quantity and quality you need.
Pressure Swing Adsorption (PSA) is a cost-efficient process for producing a high purity oxygen or nitrogen.
What is a PSA?
PSA means Pressure Swing Adsorption.
Elevated pressures, normally 4-8Bar are needed for the process.
2 vessels working in counter phase in terms of pressurizing and depressurizing.
The PSA principle is used for separation of atmospheric air, where product gases are separated from others by adsorption process.
How does it work?
Oxymat’s on-site oxygen and nitrogen generators are based on the well-known PSA (Pressure Swing Adsorption Technology) using two pressurized columns with molecular sieves to ensure continuous production, for separation of either oxygen or nitrogen from other gases.
An Oxymat generator is composed of two cylinders storing either Zeolite pellets or Carbon Molecular Sieves (CMS). Zeolite is used to produce oxygen. CMS is used to produce nitrogen.
Dry compressed air is blown through a valve to the first vessel where the pressure is built to reach 4 to 8 bar(g). The unwanted gas is adsorbed by the pellets during the building of the pressure, and the molecules you want will pass through to the accumulation tank.
While pressure is built in one vessel, the second vessel is regenerated by a pressure decrease, to guarantee a continuous flow. Before the subsequent adsorption or desorption stage, a pressure equalization between the adsorption vessels will take place. When the pressure decreases in the first cylinder and the pellets are saturated, the waste product is exhausted through the exhaust system.The pressure in the second vessel will now be build up until the pressure between both vessels are once again equalized. For a constant production of gas, this process is constantly repeated.
Our PSA nitrogen generators can produce purities between 95-99.9999% (1 ppm) nitrogen. Our PSA oxygen generators produce purities between 92-95 % oxygen.
Advantages of PSA