An investigation of the textural properties of mesostructured silica-based adsorbents for predicting CO2 adsorption capacity

Abstract

Among the technologies proposed to reduce greenhouse gas emissions, adsorption with porous solids has been widely studied in the past few years. Herein, up to 30 inorganic porous adsorbents have been studied, obtaining their CO₂ uptake at 45 °C and ambient pressure, typical conditions of industrial post-combustion facilities after the desulphurization step. A clear relationship between CO₂ adsorption capacity and the combination of surface area (S_BET) and sorbent affinity towards gas molecules through C parameter was found. This study provides novel findings that allow the prediction of CO₂ uptake in mesostructured silica physisorbents from their textural properties.