I have been wondering for years why solar powered pyrolysis wasn't being used to recycle plastics. I thought it could reduce ALL plastics to an oil soup kinda like crude, which could then easily be separated by a distillery into various useful hydrocarbon oils for making new plastics/fuels. However now I'm starting to understand: the resulting soup is more toxic than crude and is difficult/expensive to distill, while the volatile byproducts that don't condense are another toxic liability. Bummer.
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