Pufico-China Gas Expert

Working principle of pressure swing adsorption (PSA) oxygen generator


Feb 18,2020



The pressure swing adsorption (PSA) oxygen generator uses zeolite molecular sieve as the adsorbent, and uses the principle of pressure adsorption and decompression desorption to adsorb and release nitrogen from the air, thereby separating oxygen. The zeolite molecular sieve is a special The spherical granular adsorbent with micropores on the surface and inside, which is processed by the pore type treatment process, is white. Its pore characteristics enable it to realize the kinetic separation of O₂ and N₂. The separation effect of zeolite molecular sieve on O₂ and N₂ is based on the slight difference in the dynamic diameter of these two gases. N₂ molecules have a faster diffusion rate in the micropores of zeolite molecular sieve, and O₂ molecules have a slower diffusion rate. The diffusion of water and CO₂ in compressed air is not much different from nitrogen. The final enrichment from the adsorption tower is oxygen molecules.

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