Preparation of Carbon Molecular Sieves for Nitrogen Generators: The carbon molecular sieves used in nitrogen generators are mainly composed of carbon elements and appear as black columnar solids. Nitrogen can be produced using pressure swing adsorption (PSA) equipment.

PSA Nitrogen Generation Method:

In the PSA (Pressure Swing Adsorption) nitrogen generation method, carbon molecular sieves can simultaneously adsorb oxygen and nitrogen from the air. However, because oxygen molecules diffuse hundreds of times faster than nitrogen, by controlling the adsorption time, most of the oxygen can be adsorbed in a shorter time, while nitrogen remains unadsorbed, thus achieving oxygen-nitrogen separation.

Adsorption and Desorption Process:

In the PSA nitrogen generation process, adsorption and desorption are achieved through pressure difference. When the pressure increases, the carbon molecular sieve adsorbs oxygen; when the pressure decreases, the molecular sieve releases the adsorbed oxygen, thus achieving desorption.

Process Flow:

The basic process flow for PSA nitrogen generation includes air compression, purification, oxygen-nitrogen separation in an adsorption tower, and regeneration of the molecular sieve through pressure equalization and backflushing.

System Composition:

The PSA nitrogen generation system consists of an air compressor, air purification system, air storage tank, switching valve, adsorber, and oxygen buffer tank. The system is automatically controlled by a PLC and automatic switching valves to ensure continuous production of high-quality nitrogen.

Selective Adsorption by Molecular Sieves:

The molecular sieve device enables efficient, continuous, and stable nitrogen production and can separate high-purity nitrogen from the air.

Characteristics of Carbon Molecular Sieves:

Carbon molecular sieves are commonly used adsorbents in PSA nitrogen generators. Their separation of oxygen and nitrogen is based on the different diffusion rates of these two gases on the molecular sieve surface.