Abstract
Plastic waste is a promising and abundant resource for H2production. However, upcycling plastic waste into H2fuel via conventional thermochemical routes requires relatively considerable energy input and severe reaction conditions, particularly for polyolefin waste. Here, we report a tandem strategy for the selective upcycling of polypropylene (PP) waste into H2fuel in a mild and clean manner. PP waste was first oxidizedinto small-molecule organic acids usingpure O2as oxidantat 190 °C, followed by the catalytic reforming of oxidation aqueous products over ZnO-modified Ru/NiAl2O4catalysts to produce H2at 300 °C. A high H2yield of 44.5 mol/kgPPand a H2mole fraction of 60.5% were obtained from this tandem process. The entire process operated with almost no solid residue remaining and equipment contamination, ensuring relative stability and clean of the reaction system. This strategy provides a new route for low-temperature transforming PP and improving the sustainability of plastic waste disposal processes.
Published Version
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