Improving the direct air capture capacity of grafted amines via thermal treatment

Abstract

This study investigates the effects of elevated temperature thermal treatments on the direct air capture of CO₂ by aminosilane-grafted SBA-15 silica sorbents. Exposing samples to high temperatures (200–250 °C compared to 80–120 °C) in an inert environment resulted in improved CO₂ capacity (5–21%) that was sustained over multiple adsorption/desorption cycles.