Synthesis of a Carbazole-Based Nanoporous Organic Polymer for Efficient Adsorption/Separation of C<sub>2</sub>H<sub>2</sub> and CO<sub>2</sub>
Jiangli Zhu, Lulu Wei, Haiyu Sun, Jun Yan, Zefeng Wang
Abstract
The development of nanoporous organic polymers (NOPs) for the adsorption/separation of acetylene (C 2 H 2 ) and carbon dioxide (CO 2 ) poses significant challenges due to their similar physical and chemical properties. This paper presents the synthesis of a carbazole-based nanoporous organic polymer (CNOP-6) through a facile Friedel–Crafts reaction using 3,6-di(9-carbazolyl)-9-phenylcarbazole as the monomer. Remarkably, the specific surface area of CNOP-6 is up to 1334 m 2 ·g –1 . CNOP-6 demonstrates a C 2 H 2 adsorption capacity of 80.2 cm 3 ·g –1 at 298 K and 100 kPa. The results of ideal adsorbed solution theory and breakthrough curves unequivocally demonstrate the potential of CNOP-6 as an exceptional adsorbent for the purification of C 2 H 2 from CO 2 .