Pressure swing adsorption (PSA) nitrogen

What is PSA nitrogen?

PSA is short for pressure swing adsorption.

Elevated pressures, normally 5-10 bar(g), are needed for the process. Higher pressure can be applied, if required.

Two vessels work in counter phase in terms of pressurising and depressurising.

The PSA principle is applied for separation of atmospheric air where nitrogen is separated from air through adsorption.

How does it work?

OXYMAT on-site nitrogen generators are based on the well-known PSA (pressure swing adsorption) technology. Two pressurised vessels with molecular sieves ensure continuous production for separation of nitrogen from other gases.

An OXYMAT nitrogen generator consists of two pressure vessels storing carbon molecular sieves (CMS).

Dry compressed air is blown through a valve to the first vessel where the pressure is built to reach 5 to 10 bar(g). The unwanted gas (oxygen) is adsorbed by the pellets during the building of pressure, and the nitrogen will pass through to the accumulation tank.

While pressure is building up in one vessel, the other vessel is regenerating through a decrease in pressure, all to guarantee a continuous flow. Before the subsequent adsorption or desorption stage, a pressure equalisation between the adsorption vessels will take place. When the pressure decreases in the first vessel, and the CMS pellets are saturated, the waste product is exhausted through the exhaust system. The pressure in the second vessel will now build up until the pressure between both vessels is once again equalised.

Advantages of PSA

The process of the pressure swing adsorption (PSA) technology is an extremely clean operation. The only ‘raw material’ is air.

OXYMAT on-site nitrogen generators allow for an uninterrupted supply of gas with a high purity output. This means that you can produce nitrogen where and when you need it, and in the exact quantity and quality you need.

PSA is a cost-efficient process for producing high purity nitrogen.

For an uninterrupted production of gas this process is continuously repeated.

Our PSA nitrogen generators can produce purities between 95-99.9999% (1 ppm) nitrogen.

Applications overview

The PSA technology is used in a wide variety of applications. Click to learn more about the advantages of a PSA nitrogen plant from OXYMAT for your specific application.

Nitrogen generator applications

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