Study on the Adsorption Performance of a Direct Air Capture CO₂ Adsorbent
Rising atmospheric CO₂ concentrations have intensified interest in carbon-capture technologies capable of achieving negative emissions. Among these, Direct Air Capture (DAC) removes CO₂ directly from ambient air, where the partial pressure of CO₂ is approximately 40 Pa, far lower than flue gas concentrations (~12 kPa). This low driving force imposes stringent requirements on adsorbent materials and limits the applicability of membrane separation or cryogenic methods. Solid sorbents, in contrast to liquid amine solutions, avoid issues associated with solvent volatility, corrosion, and high regeneration energy, making them well-suited for DAC systems.
