The second set of results, denoted with a superscript b, is designed for direct comparison with experimental data. In the experimental setup, each gas of interest is introduced individually at 1 bar, creating a 1 bar partial pressure drop for the target gas. This allows measurement of permeability under single-component conditions. The process is repeated for the other gas, and the ideal perm-selectivity is calculated as the ratio of the single-component permeabilities. For a direct comparison with experimental data, we replicate this setup by simulating a 1 bar inlet for N 2 and CO 2 individually, averaging their permeabilities across three configurations to report their permeabilities and ideal perm-selectivity.