Starting with C 1 , ϵ sA is set to 5.3 in dimensionless units, whereas ϵ sB is scaled to maintain the ratio ϵ sA ϵ sB = ϵ AA ϵ BB . In C 2 , ϵ sA and ϵ sB are scaled down by factor of 3 based on C 1 . In case of C 3 , ϵ sA is the same as in C 1 , but ϵ sB is 5.5 times lower compared to the same parameter in C 1 to create a case with a particularly strong sorption selectivity of the system towards A, representing CO 2 (Table ).