“…These results confirm that the presence of hierarchical pores within activated SIS-derived carbons can lead to excellent CO 2 capture performance, which is comparable to or higher than several recent reports. 72,73 For example, a very recent work from Mohamed et al reported the development of porous organic polymers linked with crown ether and benzoxazine through a multi-step procedure, which can uptake CO 2 up to 5.8 mmol g À1 at 0 1C. 74 Moreover, using the CO 2 sorption capacity of activated SISderived carbons at 0 1C and 25 1C and various pressure, the heat of adsorption for these samples can be determined according to Clausius-Clapeyron equation, which is in the range of 15-28 kJ mol À1 , consistent with physisorption mechanism and suggesting a small amount of energy would be enough for sorbent regeneration.…”