'Moisture-swing' technique enables energy-efficient carbon capture from air

New research from Northwestern University demonstrates a novel approach to capturing carbon dioxide from ambient air using a "moisture-swing" technique. The method leverages the relationship between humidity and CO2 absorption, capturing CO2 at low humidities and releasing it at high humidities. By testing a variety of ions, the researchers identified those with the highest valency as the most effective, primarily phosphates, which enable efficient moisture-swing carbon capture. The advancement provides an energy-efficient carbon removal method that can extract CO2 directly from the atmosphere, helping to offset emissions and combat climate change. (SciTechDaily)