The process modeling outcome also includes the tradeoffs between the process based figures of merits (CO 2 purity, recovery, specific energy consumption and volumetric productivity) reported in Figure . As shown in Figure and Figure , the purity vs. recovery and specific energy vs productivity are unchanged as a function of diffusivity. In ca case of the MOCHIW Figure , the purity vs recovery pareto fronts show gradual shift from top right corner to bottom left, moving from 1 µm crystal size to 10 µm and 100 µm. The maximum recovery possible decreases from near 98% for 1 µm crystal to 89% for 10 µm to 18% for 100 µm crystal. For EVOMOR, due to very poor diffusivities, the separation performance of MOF goes from good to very poor by just changing constant diffusivity to any crystal size as shown in Figure A representative MOF ranking is given in Table for the 20 highest-ranked MOFs by volumetric productivity at constant K eff . For the same set of MOFs, the rank-order by volumetric productivity is also provided for crystallite diameters R µ =1 µm, 10 µm, and 100 µm, respectively. These rankings account for structure-dependent, molecular diffusivity. As examples of the influence of diffusivity and crystallite diameter on rank-order, VASFON maintains second place in the ranking and becomes the highest-ranked MOF at R µ =100 µm while (BOHGOU) drops out of the TOP-20 list. The MOF structure MOCHIW ranks successively lower as R µ increases, falling from rank #12 to #495 at R µ =100 µm.