Recent progress in porous organic polymers and their application for CO2 capture

Carbon capture, storage, and utilization (CCSU) is recognized as an effective method to reduce the excessive emission of CO₂. Absorption by amine aqueous solutions is considered highly efficient for CO₂ capture from the flue gas because of the large CO₂ capture capacity and high selectivity. However, it is often limited by the equipment corrosion and the high desorption energy consumption, and adsorption of CO₂ using solid adsorbents has been receiving more attention in recent years due to its simplicity and high efficiency. More recently, a great number of porous organic polymers (POPs) have been designed and constructed for CO₂ capture, and they are proven promising solid adsorbents for CO₂ capture due to their high Brunauer-Emmett-Teller (BET) surface area (S_BET), adjustable pore size and easy functionalization. In particular, they usually have rigid skeleton, permanent porosity, and good physiochemical stability. In this review, we have a detailed review for the different POPs developed in recent years, not only the design strategy, but also the special structure for CO₂ capture. The outlook of the opportunities and challenges of the POPs is also proposed.