Impact of high-pressure torsion on hydrogen production from photodegradation of polypropylene plastic wastes

Hydrogen production from plastic waste processing: A review

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This review pulls together existing research on turning plastic waste into clean-burning hydrogen fuel instead of letting it pile up in landfills or oceans (where it can break down into microplastics that end up in our water, food, and bodies). Scientists are testing several methods, like heating plastic without oxygen (pyrolysis) combined with steam or special catalysts, and some approaches already work at pilot scale, though they're not yet cheap or efficient enough for widespread use. The bigger picture: if perfected, this technology could offer a win-win, reducing plastic pollution while producing low-carbon energy.

Plastics: Photodegradations and Mechanisms

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This chapter detailed the photodegradation mechanisms by which UV radiation breaks polymer chains in common plastics, progressively generating smaller microplastic and nanoplastic fragments without eliminating the material from the environment. Understanding these photochemical pathways clarifies why sunlight-exposed plastic waste — in oceans, soils, and landfills — continuously generates new microplastic particles that accumulate in ecosystems and food chains.

Comprehensive Insights into Photoreforming of Waste Plastics for Hydrogen Production

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This review examines photocatalytic "photoreforming" — a solar-powered process that breaks down waste plastics while simultaneously generating hydrogen fuel and useful chemical byproducts. Recent advances in catalyst design, including semiconductor materials and metal-organic frameworks, are analyzed alongside factors like light intensity and pH that affect hydrogen output. This dual-purpose approach could help address both the global plastic waste crisis and the need for clean energy simultaneously.

Plastic waste to liquid fuel: A review of technologies, applications, and challenges

Thermochemical conversion of plastic waste to fuels: a review

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Researchers reviewed thermochemical technologies — such as pyrolysis and gasification — that can convert plastic waste into usable fuels, offering a promising approach to reducing the massive volumes of non-biodegradable plastic that currently accumulate in the environment as microplastics.