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| Hydrocracking Our Way to Recycling Plastic Waste |
| 2021-4-28 |
Polyolefins account for 60 to 70% of all plastics made today.
SEATTLE (Waste Advantage): In the United States, less than 9% of plastic waste is recycled. Instead, more than 75% of plastics waste ends up in landfills and up to 16% is burned, a process that releases toxic gases into the atmosphere. Researchers from the University of Delaware¡¯s Center for Plastics Innovation (CPI) have developed a direct method to convert single-use plastic waste ¡ª plastic bags, yogurt containers, plastic bottles and bottle caps, packaging and more ¡ª to ready-to-use molecules for jet fuels, diesel and lubricants. The work, reported in a paper in Science Advanceson Wednesday, April 21, focuses on using a novel catalyst and unique process to quickly break down these hardest-to-recycle plastics, known as polyolefins. Polyolefins account for 60 to 70% of all plastics made today.
The UD-developed process requires approximately 50% less energy than other technologies, and it doesn¡¯t involve adding carbon dioxide to the atmosphere, an emissions savings over other commonly used techniques. It can be done in just a couple hours at low temperature, around 250 degrees Celsius. This is slightly higher than the 450-degree Fahrenheit oven temperature you might use to roast vegetables or bake a puff pastry at home.
Importantly, the UD team¡¯s method can treat a variety of plastics, even when they are mixed together, a plus considering the way recyclables are managed. ¡°Chemical conversion is the most versatile and robust approach to combat plastics waste,¡± said Dion Vlachos, the project principal investigator and the Unidel Dan Rich Chair in Energy Professor of Chemical and Biomolecular Engineering at UD. |
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2024-12-19
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Item |
SHFE |
Change |
Cu |
84557 |
-13199 |
Al |
214501 |
-9875 |
Zn |
50666 |
-2317 |
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LME |
Change |
Cu |
272325 |
+0 |
Al |
665025 |
-2500 |
Zn |
257525 |
-2875 |
Ni |
161238 |
+318 |
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2023-5-15 |
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