Sorbent Regeneration via Radiofrequency-Assisted Dielectric Heating for Direct Air Capture of CO2

Zeeshan, Muhammad; Gurkan, Burcu

doi:10.1021/acsaenm.5c00202

Sorbent Regeneration via Radiofrequency-Assisted Dielectric Heating for Direct Air Capture of CO₂

Journal Article · Tue Apr 15 04:00:00 EDT 2025 · ACS Applied Engineering Materials

DOI:https://doi.org/10.1021/acsaenm.5c00202· OSTI ID:2587591

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Case Western Reserve University, Cleveland, OH (United States)

Direct air capture (DAC) of CO₂ is a negative emission technology that utilizes sorbents requiring a regeneration step for repeated ab(/d)sorption–desorption cycles. Here we report an unconventional approach to desorb captured CO₂ from a porous sorbent using radiofrequency (RF) irradiation for dielectric heating and targeted energy transfer, thus enabling modularity and promoting renewable energy input. Regeneration of composites of functional ionic liquid and metal–organic framework with high CO₂ capacity and enhanced transport is demonstrated under conditions relevant to DAC. RF-assisted dielectric heating at the megahertz frequency range shows effective absorption of electromagnetic energy and consequently rapid release of the captured CO₂.

View Accepted Manuscript (DOE)

Research Organization:: Case Western Reserve University, Cleveland, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)

Grant/Contract Number:: SC0022214

OSTI ID:: 2587591

Journal Information:: ACS Applied Engineering Materials, Journal Name: ACS Applied Engineering Materials Journal Issue: 4 Vol. 3; ISSN 2771-9545

Publisher:: ACS PublicationsCopyright Statement

Country of Publication:: India

Language:: English

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