首页|Microwave-assisted synthesis of novel porous organic polymers for effective selective capture of CO2
Microwave-assisted synthesis of novel porous organic polymers for effective selective capture of CO2
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NSTL
Performing carbon dioxide (CO2) capture in an environmentally benign and cost-effective way is challenging owing to several factors including selectivity. Thus, the development of polymers that provide high capacity and selectivity for the removal of CO2 gas is important. N-based porous polymers are promising for CO2 capture due to their abundant porosity, variable surface characteristics, and great stability. Herein, porous organic polymers were synthesized by microwave-assisted Freidel-Crafts alkylation of 2,2'-bipyridine and pyrrole with dimethoxymethane as a cross-linker. The synthesized polymers were characterized by Fourier transform infrared, nuclear magnetic resonance, thermogravimetric analyzers, and surface analyzers based on Brunauer-Emmett-Teller theory (BET). The porous polymers exhibited high surface areas of 580-930 m~2/g. The polymers showed high ideal adsorbed solution theory (IAST) selectivity of 53-63 toward CO2 over N2 at 1 bar and 298 K under flue gas composition. Whereas the selectivity toward CO2 over CH4 at 1 bar and 298 K under natural gas composition was 12-18. The synthesized polymers achieved exceptional H20 adsorption capacity at P/P0 = 0.9 and 293 K of 35-45 mmol/ g. The results reveal the polymers provide promising candidates for the CO2 capture from various mixtures, such as flue gas and natural gas.
NSTL
