2-Amino-2-Methyl-1-Propanol Aspen Plus CCGT CO2 CO2 capture CO2 sequestration H2S absorption History of engineering & technology Knudsen diffusion L-Arginine MXene Minitab N-methyldiethanolamine Reaction SO2 adsorption Taguchi UNIFAC absorption intensification activated carbons activity amine solutions anti-attrition aqueous and non-aqueous solutions arsenene bidisperse diffusion model biogas upgrading bubble column calcination calcium carbonate precipitation calcium looping