Capturing carbon dioxide from air with charged-sorbents

Capturing carbon dioxide from air with charged-sorbents

5 June 2024 | Huaiuguang Li12, Mary E. Zick3, Teedhat Trisukhon1, Matteo Signorile4, Xinyu Liu1, Helen Eastmond1, Shivani Sharma1, Tristan L. Spreng1, Jack Taylor1, Jamie W. Gittins1, Cavan Farrow1, S. Alexandra Lim3, Valentina Crocella4, Phillip J. Milner3 and Alexander C. Forse125
This article introduces a new class of sorbents called "charged-sorbents" for direct air capture (DAC) of carbon dioxide. These materials are prepared by electrochemically inserting reactive hydroxide ions into the pores of low-cost activated carbons, which then serve as sites for carbon dioxide adsorption. The charged-sorbents can rapidly capture carbon dioxide from ambient air through (bi)carbonate formation, with regeneration at low temperatures (90–100 °C) and using renewable electricity through Joule heating. The materials exhibit enhanced CO2 uptake at low pressures due to chemisorption, and their oxidative stability and rapid regeneration make them promising for DAC processes. The study demonstrates the effectiveness of charged-sorbents in capturing CO2 directly from ambient air and highlights their potential for applications in chemical separations and catalysis.This article introduces a new class of sorbents called "charged-sorbents" for direct air capture (DAC) of carbon dioxide. These materials are prepared by electrochemically inserting reactive hydroxide ions into the pores of low-cost activated carbons, which then serve as sites for carbon dioxide adsorption. The charged-sorbents can rapidly capture carbon dioxide from ambient air through (bi)carbonate formation, with regeneration at low temperatures (90–100 °C) and using renewable electricity through Joule heating. The materials exhibit enhanced CO2 uptake at low pressures due to chemisorption, and their oxidative stability and rapid regeneration make them promising for DAC processes. The study demonstrates the effectiveness of charged-sorbents in capturing CO2 directly from ambient air and highlights their potential for applications in chemical separations and catalysis.
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[slides and audio] Capturing carbon dioxide from air with charged-sorbents