Introduction

A nitrogen generator operates based on the principle of PSA (Pressure Swing Adsorption), using carbon molecular sieve as the adsorbent. Under certain pressure, when purified compressed air passes through the adsorption vessels, nitrogen (N₂) is separated from the air through cycles of compression and decompression.

Because oxygen (O₂) molecules diffuse faster than nitrogen molecules within the carbon molecular sieve, oxygen is preferentially adsorbed while nitrogen is collected and delivered as the final product. After adsorption, the sieve is decompressed to release the trapped oxygen molecules — a process known as regeneration.

Typically, the system uses two towers: one for nitrogen production (PSA) and the other for regeneration. The entire process is automatically controlled by a PLC and valve system, ensuring continuous, uninterrupted operation.