“…Among several approaches to capture CO 2 , adsorption has been recognized as an economically available option as a result of the lower energy-consumption for adsorbent regeneration [5], lower cost of the adsorbents, and easier operation [6,7], compared to the conventional absorption process [8,9]. Various adsorbents have been reported to be capable of adsorbing CO 2 , including zeolites [10][11][12][13][14][15], activated carbon [12,16,17], metal organic frameworks (MOF) [18][19][20]. Choi et al [1,21] developed modified PEI-based aminosilica adsorbents, and applied them for the capture of carbon dioxide from air.…”