Scientists Built A Solar Panel That Turns Plastic Bottles Into Clean Fuel

Researchers at the University of Cambridge have demonstrated a solar-powered reactor that converts discarded plastic bottles into clean hydrogen fuel using nothing but natural sunlight, and for the first time they have done it at a scale and in conditions that actually resemble the real world rather than a controlled laboratory. The breakthrough, published in Nature Chemical Engineering, builds on a process called photoreforming, in which a photocatalyst coating on a glass panel absorbs sunlight to drive a chemical reaction that simultaneously breaks down plastic waste and splits water molecules to release hydrogen gas that burns clean and leaves only water as a byproduct. The key advance is scale and simplicity: previous versions of the reactor used a panel measuring roughly 25 square centimetres and required high temperatures, harsh chemicals, or complex manufacturing processes. The new version is approximately one square metre, manufactured at room temperature using what co-author Ariffin Bin Mohamad Annuar described as a tool you could practically buy at a hardware store, specifically a standard paint sprayer that applies the catalyst coating directly onto the glass.

The team placed the panel outside Cambridge's Department of Chemistry and let the natural, uncontrolled British sunlight run the reaction, which produced hydrogen and valuable industrial chemicals from both cellulose and PET plastic, the clear material used in fizzy drink bottles, in outdoor conditions that a future commercial system would actually face. Tiny bubbles of hydrogen crept across the wet surface of the panel as sunlight did its work. Professor Erwin Reisner, who leads the research group, said the field needs to develop a very scalable way to make these reactors and prove they work outdoors, and that this demonstration shows a clear path toward doing that. The team also carried out a cost analysis to model what commercial scaling would realistically require, something this type of research has not previously included, finding that the spray-coating method significantly reduces manufacturing costs compared with earlier approaches. The researchers acknowledge that durability and efficiency still need further improvement before the technology is ready for commercial deployment, but a patent has been filed with Cambridge Enterprise and the team is actively working toward it. The planet generates more plastic waste than any recycling system currently handles, and clean hydrogen remains one of the most sought-after fuels for a zero-carbon future. This panel, sitting outside a chemistry building, is trying to address both at once.

Source:https://www.earth.com/news/plastic-bottles-transformed-into-clean-fuel-using-only-sunlight/