Abstract
Abstract In this work, a porous organic polymer (POP) exhibiting abundant N species and rich mesopores was synthesized by solvothermal copolymerization of divinylbenzene (DVB) and 1-vinylimidazole (VI) without the use of any templates. The synthesized POP, abbreviated as P (DVB-VI), was used as the support for pentaethylenehexamine (PEHA) impregnation to prepare solid adsorbents for CO2 capture. The porous and chemical structures of prepared samples were characterized by elemental analysis, N2 adsorption, electron microscopy, infrared spectra, and thermogravimetric analysis. The CO2 capture performance of prepared samples was also systematically investigated by measuring the CO2 adsorption capacities and CO2/N2 selectivities, and the effect of moisture on CO2 adsorption and recyclability of adsorbents was examined. It was found that PEHA-impregnated P (DVB-VI) adsorbents displayed CO2 capacities of as high as 4.56 mmol/g at 75 °C and atmospheric pressure, together with excellent CO2/N2 selectivities and good recycling stability.
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