Carbon dioxide capture in the presence of water by an amine-based crosslinked porous polymer

An amine-functionalized, crosslinked porous polymer is synthesized by linking 1,4-benzenediamine and pyrrole with p-formaldehyde in the presence of hydrochloric acid catalyst. The resulting polymer was structurally characterized and proven permanently porous with a surface area of 305 m(2) g(-1). The high concentration of amines (-NH- and -NH2) within the backbone of the polymer result in exceptional selectivity (141) for CO2 over N-2 and dynamic capacity (15.1 cm(3) g(-1)) in the presence of water (20 : 80 v/v CO2 : N-2, 91% relative humidity, 1 bar, and 298 K). The performance of this polymer is maintained over 45 cycles without loss of selectivity, capacity, nor recyclability at room temperature; making it stand out among all porous organic materials used for carbon capture.