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

Abstract

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.

Keywords: Amino acids; High CO(2) capturing capacity; Microspheres; Porous hypercrosslinked polymers.