With a certain amount of adsorbent, the height of the adsorbent must not be less than the length of the adsorption zone. This is because when the adsorbent bed height is lower than the length of the adsorption zone, the adsorber will be switched on and the adsorption capacity will be small or even zero. At this point it is necessary to reduce the adsorption cross section and increase the bed height to increase the adsorption capacity. But...