Development of high efficiency adsorbents for CO2 capture based on a double-functionalization method of grafting and impregnation

Abstract

A functionalization method based on the impregnation of previously grafted pore-expanded SBA-15 is presented. The combination of tethered and mobile amino groups has led to a synergic effect, yielding samples with CO₂ uptakes up to 235 mg CO₂ per g (5.34 mmol CO₂ per g) at 45 °C and 0.15 bar CO₂ and high adsorption efficiencies.