Measuring and Modeling Water and Carbon Dioxide Adsorption on Amine Functionalized Alumina under Direct Air Capture Conditions.

ABSTRACT: Water vapor is an unavoidable component of ambient air that sorbents designed for atmospheric CO₂ capture must contend with. Amine functionalized sorbents often exhibit an enhancement of CO₂ uptake in the presence of moisture through a variety of mechanisms, and in this work, we investigate the coadsorption of water and CO₂ on amine functionalized alumina. Sorbent performance is examined under varying levels of humidity and temperature using three common measurement techniques: gravimetric, volumetric, and breakthrough methods. Our findings show that water increasingly enhances CO₂ adsorption up to the monolayer saturation point of water, above which no further enhancement is observed. Competitive adsorption is observed primarily at low relative

SUBMITTER: Grossmann Q 

PROVIDER: S-EPMC11969556 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature