Pressure alternating adsorption process to extract a more preferred gas from a mixture of said more preferred gas and less preferred gas.

摘要

"ADSORPTION PROCESS BY PRESSURE ALTERNATION TO EXTRACT MORE PREFERRED GAS FROM A MIXTURE OF THE MOST PREFERRED GAS AND LESS PREFERRED GAS". A PSA process constituting the invention is applicable for separating a preferred gas from a mixture of the preferred gas and a less preferred gas. The PSA process uses an adsorbent bed that includes one or more layers of selective adsorbents, by equilibrium, for O ~ 2 ~, and comprises the aforementioned process, the steps of: pressurizing the adsorbent bed to a high pressure with an air supply for allowing the adsorbent bed to adsorb O ~ 2 ~; extract the bed, at bed pressure, a flow of N ~ 2 ~ and store at least a little of the flow in a product tank; desorbing ~ 2 ~ from the adsorbent bed by feeding gas from the empty region within the bed enclosure to a storage tank and opening the adsorbent bed to a low pressure region; purge the adsorbent bed by feeding it with gas from the empty region from the storage tank; and repressurizing the adsorbent bed to an intermediate pressure with a flow of gas from the empty region from the storage tank.