Hydroxide modified activated alumina as an adsorbent for CO2 adsorption: Experimental and modeling

Activated alumina (AA) was modified with sodium hydroxide and potassium hydroxide solutions to enhance carbon dioxide adsorption capacity. The process optimization was carried out using response surface methodology (RSM) based on central composite design (CCD) with two variables, the temperature and pressure in the range of (20–80 °C) and (2–10 bar), respectively. In addition, the effect of operating parameters including adsorbent amount,...