PSA technology allows nitrogen molecules to be isolated from other molecules in compressed air (water, oxygen, CO2, etc). The carbon molecular sieve (CMS), the adsorbent in the generator, retains all those molecules and only lets the nitrogen pass through to the outlet. While the CMS in one vessel regenerates, a second connected vessel goes through the same adsorption cycle. These two connected vessels work together to ensure a near-continuous flow of nitrogen gas.

Step 1: Adsorption
Pre-filtered compressed air is passed through one CMS-filled vessel. Oxygen is adsorbed by the CMS and Nitrogen comes out as the product gas. After some time of operation, the CMS inside this vessel gets saturated with Oxygen and can no longer adsorb.

Step 2: Desorption
Upon saturation of the CMS in the vessel, the process switches nitrogen generation to the other vessel, while allowing the saturated bed to start the process of desorption and regeneration. The waste gas (oxygen, carbon dioxide, etc.) is discharged into atmosphere.

Step 3: Regeneration
To regenerate the CMS in the vessel, part of the Nitrogen produced by the other tower is purged into this tower. This allows for quick regeneration of the CMS to make it available for production in the next cycle. The cyclical nature of the process between the two vessels ensures continuous production of pure Nitrogen.

• Oil tanker ship
• Chemical ship
• LNG ship
• Oil & Gas project

• Unique molecular sieve protective measures to extend the service life of carbon molecular sieve
• Self-reliance type cylinder pressure device prevents high speed airflow rush-out and molecular sieve pulverization, equipped with limit settlement alarm system
• Configured with DCS remote control system interface for computer monitoring
• Intelligent interlocking nitrogen vent device guarantees nitrogen quality
• Optimized process design with excellent energy conservation characteristics reduces gas production costs