Patent ID: 10889678

Abstract:
An amine-functionalized, crosslinked porous copolymer can be synthesized by linking 1,4-benzenediamine and pyrrole with p-formaldehyde in the presence of concentrated hydrochloric acid catalyst. The polymer is permanently microporous, with a BET surface area of 250 to 350 m2/g. Due to the high concentration of polar amines within its backbone, the polymer exhibits a CO2 uptake of 17.5 to 30 cm3/g at 298 K and 1 bar, but demonstrated a remarkably high selectivity for CO2 over N2 at 298 K. Dynamic breakthrough experiments indicate that this material is an effective adsorbent for selectively separating CO2 from a dry and wet gas mixture containing N2 for over 45 cycles without significant loss of performance. Furthermore, the polymer can be regenerated at room temperature after each cycle by a simple N2 flow.