Solar-powered Device Captures Carbon Dioxide From Air to Make Sustainable Fuel
Published by Todd Bush on February 14, 2025
Researchers at the University of Cambridge have developed a solar-powered reactor that pulls carbon dioxide directly from the air and converts it into sustainable fuel using sunlight.
The reactor, highlighted in Nature Energy, could produce fuel for cars, planes, and chemicals without relying on fossil fuels, CO2 transport, or storage. The device captures atmospheric CO2 and uses sunlight to create syngas, a key chemical intermediate.
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Professor Erwin Reisner, who led the research, said, “Aside from the expense and energy intensity, CCS provides an excuse to carry on burning fossil fuels. Our system makes something useful from CO2 without storing it underground.”
Dr. Sayan Kar, lead author, added, “CO2 is harmful, but we can turn it into useful chemicals without contributing to global warming.”
The device works like photosynthesis, using sunlight without external power. Specialized filters capture CO2 at night, which is then converted into syngas during the day using infrared and ultraviolet radiation.
The team is developing a larger version and aims to convert syngas into liquid fuels for vehicles and planes. If scaled up, the reactor could remove CO2 from the atmosphere and create clean fuel for remote locations.
Reisner’s research group focuses on devices that convert waste, water, and air into fuels. The project is supported by UKRI, the European Research Council, the Royal Academy of Engineering, and the Cambridge Trust.
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