S.F. The separation factor -defined for HBCC technologies specifically -exhibits a trend opposite to that of the other KPIs examined, demonstrating that it is enhanced by lower reactor pressure. This is best understood by examining the composition of the mixed hydrates forming during capture (cf. Fig. of the ESI) and perfectly in line with theoretical predictions according to CSMGem . At lower pressures, mixed hydrates show a strong preference for incorporating CO 2 molecules over N 2 , with a significant margin. Conversely, as pressure increases, the captured gas becomes increasingly enriched with N 2 . In general, S.F.s determined in this study are significantly higher than those reported in other HBCC studies . This improvement can be attributed to the lower operating temperatures of this novel HBCC route, confirming the suspected advantage of higher selectivity within the investigated parameter ranges.