Porous carbon derived via KOH activation of a hypercrosslinked porous organic polymer for efficient CO2, CH4, H-2 adsorptions and high CO2/N-2 selectivity

摘要

Microporous carbon having Brunauer-Emmett-Teller (BET) surface area of 2186 m(2) g(-1) and micropore volume of 0.85 cm(3) g(-1) has been synthesized via KOH induced high temperature carbonization of a nonconjugated hypercrosslinked organic polymer. Owing to the templating and activation by KOH, we have succeeded in making a microporous carbon from this porous polymer and the resultant carbon material showed high uptake for CO2 (7.6 mmol g(-1)) and CH4 (2.4 mmol g(-1)) at 1 atm, 273 K together with very good selectivity for the CO2/N-2 (30.2) separation. Furthermore, low pressure (1 atm) H-2 (2.6 wt%, 77 K) and water uptake (57.4 wt%, 298 K) ability of this polymer derived porous activated carbon is noteworthy. (C) 2015 Elsevier Inc. All rights reserved.