Regeneration is the reverse process of adsorption. Because the adsorbent loses its adsorption capacity after absorbing the absorbed components. Certain measures must be taken to drive the adsorbed components away from the surface of the adsorbent and restore the adsorption capacity of the adsorbent, which is called "regeneration".
There are two methods of regeneration: one is to use the principle of reducing the adsorption capacity of the adsorbent at high temperature to pass the heated gas into the adsorbent layer to raise the temperature of the adsorbent, which is decomposed and absorbed by the adsorption group, and then carried out of the adsorber by the heated gas. The higher the regeneration temperature, the more thorough the desorption. This regeneration method is called heating regeneration or thermal alternative regeneration, which is the most commonly used method. It is better to use dry nitrogen or air for regeneration gas.
Another regeneration method is called depressurization regeneration or pressure alternating regeneration. During regeneration, the pressure in the adsorber is reduced, or even vacuumized, so that the partial pressure of the adsorbed molecules is reduced, and the molecular concentration is reduced, and the number of molecules adsorbed on the surface of the adsorbent is correspondingly reduced, so as to achieve the purpose of regeneration.
