Fig. 6: Gas mixture column breakthrough results.
From: Efficient separation of butane isomers via ZIF-8 slurry on laboratory- and pilot-scale

Column breakthrough curve for a n-butane(1)/isobutane(2) gas mixture (z2 = 59 mol%) using ZIF-8(30wt%)/DMPU-water slurry at 303.15 K and 2 bar. (Gas flow rate: 60 mL/min).