An et al. (2026): Synergistic enhancement of direct air capture by dual-amine functionalized γ-Al₂O₃ and high gravity adsorption in a rotating adsorption bed

Keju An, Dylan Wald, Kejun Chen and Ryan King, IN: Separation and Purification Technology, https://doi.org/10.1016/j.seppur.2026.132720

Direct air capture (DAC) is fundamentally constrained by the extremely low concentration of atmospheric CO₂, which leads to slow adsorption kinetics and poor utilization of adsorption sites. While considerable efforts have been devoted to developing high-capacity amine sorbents, the role of process intensification in overcoming mass-transfer limitations remains insufficiently explored. In this work, a dual-amine PEI-TEPA functionalized γ-Al₂O₃ adsorbent was coupled with a rotating adsorption bed (RAB) to simultaneously optimize sorbent properties and gas–solid mass transfer for DAC applications.

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