MIT engineers develop a new way to remove carbon dioxide from air

MIT News  October 24, 2019
Most methods of removing carbon dioxide from a stream of gas require higher concentrations, such as emissions from fossil fuel-based power plants. Researchers at MIT have designed a battery with stack of electrodes coated with polyanthraquinone, which is composited with carbon nanotubes. The electrodes have a natural affinity for carbon dioxide and readily react with its molecules in the airstream or feed gas, even when it is present at very low concentration. The battery absorbs carbon dioxide passing over its electrodes as it is being charged up, and then releases pure carbon dioxide as it is being discharged. The whole system operates at room temperature and normal air pressure. The discharged pure carbon dioxide can be used to carbonate drinks, or feed plants in greenhouses eliminating the need for fossil fuels. It could be compressed and injected underground for long-term disposal, or even made into fuel through a series of chemical and electrochemical processes…read more. Open Access TECHNICAL ARTICLE

Schematic of a single electro-swing adsorption electrochemical cell with porous electrodes and electrolyte separators. Credit: Royal Society of Chemistry Energy Environ. Sci., 2019, 

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