A mathematical model was established to investigate the binary adsorption process of CO 2 and H 2 O in vertical radial-flow adsorbers. The results showed that the variation law of the adsorption performance of the four types of adsorbers is similar to that of the flow uniformity. The flow uniformity can be used to indirectly reflect the adsorbent utilization and the adsorption performance of the adsorbers. The breakthrough regions and main adsorption regions of the different flow forms of the adsorbers are different. The centrifugal π-type adsorber has the best performance among the four types of adsorber. Compared with the centripetal Z-type adsorber, the pressure drop of the centrifugal π-type adsorber is reduced by 12.0 %, and the adsorption time of the centrifugal π-type adsorber is increased by 134 %.

A mathematical model of binary adsorption of CO2 and H2O is established to investigate the adsorption process of a vertical radial flow adsorber (VRFA). The competitive adsorption laws of CO2 and H2O in the VRFA are analyzed, the relationships between various indexes of adsorption performance are quantitatively compared, and the fitting correlation reflecting the adsorption performance is obtained. The results indicate that the main affecting parameters of flow uniformity and adsorption time are different, so it is inappropriate to only use the flow uniformity as the unique index of adsorption performance. The fitting correlation of adsorption time is obtained by central composite Design (CCD) and Kriging methods with a fitting degree of 99.1 %, which can be used to guide the design of the VRFA.