Evaluation of amine-based solid adsorbents for direct air capture: a critical review

Abstract

Direct air capture (DAC) emerges as a new technology that can contribute to “negative carbon emission”. Recent progress in surface chemistry and material synthesis has allowed a new generation of CO₂ adsorbents that can drive the future of DAC and its wide-ranging deployment. This review is intended to shed light on the recent developments in porous amine-based solid sorbents for direct air CO₂ capture, adsorbent preparation and characterization, CO₂ capture under dry and humid conditions, CO₂ adsorption kinetics, adsorption thermodynamics, sorbent regeneration, cyclic stability, essential regeneration techniques, and techno-economic analysis for CO₂ capture from air.