In the second simplified example, we focus specifically on the topological effects which may lead to substantial differences in perm-selectivity and sorption selectivity behavior. For this, we consider a channel with a dead-end side-branch pore as shown in Fig. . In static sorption calculations, the porous space in the dead-end branch shows very high selectivity due to the strong confinement and enhanced solid-fluid interactions. However, in the non-equilibrium transport studies, we observe that under the steady state conditions, there is no flux in this branch pore and it has effectively no influence on the transport properties of this structural element as these properties are dominated by the main channel through which the fluid must pass. As a result, the effective permselectivity of this element can be significantly lower than the sorption selectivity, in the case of C 3 , the difference is an order of magnitude between perm-and sorp-selectivity. We found that this observation depends only on the geometry and holds for all the cases of solid-fluid interaction tested. The disordered lattice structure considered previously of course does not feature such simple elements, but it contains complex regions of various sizes that exhibit high adsorption selectivity but do not influence fluid transport and resulting perm-selectivity.