Abstract
Abstract The entire world is moving toward carbon neutrality, and Japan is aiming to achieve a carbon neutral society by 2050. Generation of waste plastic is annually increasing, and the demand for waste plastic recycling is rapidly and globally growing to allow sustainable plastic use. Therefore, rapid and substantial promotion of plastic recycling technology is a global preferential task. The authors believe that pyrolysis is a promising strategy for recovering chemical feedstock from waste plastics, which improves global recycling capacity. Herein, global trends in waste plastic recycling were summarized in the first chapter, and feedstock recycling through pyrolysis-based approaches for hard-to-recycle plastic wastes such as polyethylene terephthalate (PET) and polyurethanes (PUs) were reviewed in the second chapter. Finally, the applicability of pyrolysis-gas chromatography (Py-GC) was verified by the investigation of the pyrolysis reaction mechanism, in situ pyrolyzate monitoring, and rapid screening of pyrolysis and catalytic reaction conditions.
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