CO₂ Capture by Hybrid Ultramicroporous TIFSIX-3-Ni under Humid Conditions Using Non-Equilibrium Cycling.

ABSTRACT: Although pyrazine-linked hybrid ultramicroporous materials (HUMs, pore size <7 Å) are benchmark physisorbents for trace carbon dioxide (CO₂ ) capture under dry conditions, their affinity for water (H₂ O) mitigates their carbon capture performance in humid conditions. Herein, we report on the co-adsorption of H₂ O and CO₂ by TIFSIX-3-Ni-a high CO₂ affinity HUM-and find that slow H₂ O sorption kinetics can enable CO₂ uptake and release using shortened adsorption cycles with retention of ca. 90 % of dry CO₂ uptake. Insight into co-adsorption is provided by in situ infrared spectroscopy and ab initio calculations. The binding sites and sorption mechanisms reveal that both CO₂ and H₂ O

SUBMITTER: Ullah S 

PROVIDER: S-EPMC9539483 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature