A combined carbon-capture and solar fuel cell device could help eradicate the need to produce new fossil fuels.
at the University of Cambridge and his colleagues have developed a device that utilises CO2 captured from industrial processes or directly from the air, filtering out other gases as needed.
“There has been a tremendous advance in developing carbon capture and sequestration technologies. In parallel, there’s been a lot of development in solar fuels devices,” says Reisner. “This is the first time combining the two.”The device is split into two compartments. One filters air though an alkaline solution that catches CO2, then converts it into syngas, a fuel that is usually used to make ammonia or methanol.
Combining these two compartments isn’t just a case of creating a two-in-one gadget because the pair actually work together. For CO2 to transform into syngas, it needs to gain some electrons. Typically, this is done by breaking up water molecules, but that process is energy-intensive, says Reisner. Instead, the two compartments act like a battery, with the CO2 sideAs a proof-of-concept prototype, the technology still has a long way to go before it can be deployed at a large scale.
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