Science, Space and Technology News 2024
Scientists are advancing chemical recycling to improve plastic waste reuse by breaking down plastics into their basic components. Researchers at ETH Zurich have developed key techniques for this process, potentially enabling the production of high-quality products and fuels from recycled plastics.
However, current recycling practices fall short of this goal. Most plastic waste is recycled mechanically: shredded and then melted down. Although this process does result in new plastic products, their quality deteriorates with each recycling step. Researchers in the group led by Javier Pérez-Ramírez, Professor of Catalysis Engineering, investigated how to break down polyethylene and polypropylene with hydrogen. Here, too, the first step is to melt the plastic in a steel tank. Gaseous hydrogen is then introduced into the molten plastic.
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