Studies on Adsorption-Desorption of CO2 by Long Chain Fatty Amine Supported on SiO2

The capture of carbon dioxide (CO2) molecules was achieved by utilizing impregnated long chain fatty amine solid sorbents. The long chain fatty amine impregnated on these solid substrates was octadecylamine (ODA) to improve CO2 adsorption-desorption capacity. The amine-loaded samples were characterized using nitrogen, N2 adsorption-desorption isotherm of Brunauer-Emmet-Teller (BET) and thermogravimetry analyzer (TGA). The prepared 25 wt % ODA/SiO2 exhibit acceptable CO2 capture capacities of 2.45 wt % CO2/adsorbent at 25 °C by using CO2 adsorption-desorption isotherm. TG profile shows that the solid sorbents able to adsorb and desorb CO2 in equivalent amount.