High-Temperature CO2 Capture Using MgO/γ-Al2O3 Materials as Adsorbent

Xin Fu

doi:10.4028/www.scientific.net/AMR.476-478.1811

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High-Temperature CO₂ Capture Using MgO/γ-Al₂O₃ Materials as Adsorbent

Abstract:

CO2 adsorbent, MgO/γ-Al2O3, was prepared by impregnation methods. The structure and surface properties of the prepared materials were characterized by XRD, N2 adsorption-desorption, in situ FIIR and CO2-TPD techniques. The results indicated that the surface area, pore size and pore volume of materials decreased with the introduction of MgO. Their capacity for CO2 adsorption could be significantly improved when the MgO loading increased from 0 to 10 wt %. CO2-TPD and in-situ FTIR showed that the materials have three basic sites which can react with CO2 to form bicarbonate, bidentate carbonate and monodentate carbonate species.