Studying the variable mass flow law of pressure swing adsorption (PSA) in the radial flow adsorber can help to accurately grasp the influence of the adsorption process and the variable factors in the bed on the oxygen production performance. An air-solid two-phase pressure swing adsorption model is established for the π-shaped centripetal radial flow adsorber

axial oxygen purity profiles

temperature wave and oxygen concentration for product gas are comparatively studied by using this model. The results show that the oxygen purity of 66.02% and the recovery of the production of 29.2% can be obtained in the outlet after the first PSA cycle. The oxygen purity increases from 66.02% to 97.5% and the recovery of the production increases from 29.2% to 38.5% during the unsteady state. The product oxygen purity and recovery are achieved to be 98.6% and 38.9% at the end of each steps in steady state

and finally the temperature difference of air-solid two-phase gradually decreases and reaches thermal balance. The mass and heat transfer between the air and the adsorbent are obtained

which provides reference for π-shaped centripetal in the PSA for oxygen production.