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Climate rewind: Scientists turn Carbon Dioxide back into Coal

A schematic illustration showing how liquid metal is used as a catalyst for converting carbon dioxide into solid coal.
Credit: RMIT University

New technique can efficiently convert CO2 from gas into solid particles of carbon. Scientists have harnessed liquid metals to turn carbon dioxide back into solid coal, in research that offers an alternative pathway for safely and permanently removing the greenhouse gas from our atmosphere. The new technique can convert CO2 back into carbon at room temperature, a process that’s efficient and scalable. A side benefit is that the carbon can hold electrical charge, becoming a supercapacitor, so it could potentially be used as a component in future vehicles.

Current technologies for carbon capture and storage focus on compressing CO2 into a liqui...

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