Fabrication and adsorption performance for CO₂ capture of advanced nanoporous microspheres enriched with amino acids

Advanced porous organic materials with high gas storage capacity and high selectivity have been rapidly developed for CO₂ adsorbents in the recent decade, due to extremely high surface area and nanoscale pore size. Here, novel amino acids-incorporated solid adsorbents based on porous hypercrosslinked polymers were fabricated by a dispersion polymerization of an aromatic monomer and quaternary ammonium salt comonomer, subsequently a hypercrosslinked reaction and an ion-exchange step. The developed adsorbents presented mesopores structure with BET surface area up to 864 m²/g and an extremely high CO₂ capturing capacity up to 60.7 wt% (13.8 mmol/g) at 273 K/1 bar. The results also showed the adsorbent had an excellent recycling ability over repetitive adsorption-desorption cycles. All the results suggest that the amino acids-modified porous sorbents are promising CO₂ sorbents that can meet the challenges of the current CO₂ capture and storage technology.