Muhammad Rabnawaz, an associate professor at Michigan State University's esteemed School of Packaging and a recent member of the National Academy of Inventors, has always held the view that the most brilliant solution is also the simplest. This philosophy is evident in his team's latest paper pub
esteemed School of Packaging and a recent member of the National Academy of Inventors, has always held the view that the most brilliant solution is also the simplest.Advanced Sustainable SystemsRabnawaz and his colleagues showed that sodium chloride — table salt — can outperform much more expensive materials being explored to help recycle plastics.
One of the reasons plastics have become so disposable is that the materials recovered from recycling aren’t valuable enough to spend the money and resources required to get them. That wax component is often undesirable, Rabnawaz said, yet it can account for more than half of products, by weight, of current pyrolysis methods. That’s even when using catalysts, which are helpful, but they often can be toxic or prohibitively expensive to be applied in managing waste plastics.
“That first paper was important, but I didn’t get excited until we worked with polyolefins,” Rabnawaz said. “Polyolefins are huge, and we just outperformed expensive catalysts.” Although pure table salt didn’t outperform a platinum-alumina catalyst the team also tested with metalized films, the results were similar, and the salt is a fraction of the cost.
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