Distribution Kinetics of Plastics Decomposition

Kodera, Yōichi; McCoy, Benjamin J.

doi:10.1627/jpi.46.155

Cited by 4 publications

(1 citation statement)

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“…Obtaining solid carbon from thermoplastics requires stabilization because these plastics typically crack into light gases through chain unzipping and β-bond scission. Pyrolysis of plastics in an open system under inert generates a large number of paraffinic and olefinic light gases with negligible carbon residue. , The general mechanism includes chain breaking, C–H bond cleavage, free radical recombination, and dismutation . Thermal decomposition of polyolefins typically starts at around 300 °C with random scission of the polymer chain into two primary radicals.…”

Section: Introductionmentioning

confidence: 99%

Upcycling Plastic Waste into Graphite Using Graphenic Additives for Energy Storage: Yield, Graphitic Quality, and Interaction Mechanisms via Experimentation and Molecular Dynamics

Gharpure,

Kowalik,

Vander Wal

et al. 2024

ACS Sustainable Chem. Eng.

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This research presents pioneering work on transforming a variety of waste plastic into synthetic graphite of high quality and purity. Six recycled plastics in various forms were obtained−including reprocessed polypropylene, high-density polyethylene flakes, shredded polyethylene films, reprocessed polyethylene (all obtained from Pennsylvania Recycling Markets Center), polystyrene foams, and polyethylene terephthalate bottles (both sourced from a local recycling bin). The waste plastics were carbonized in sealed tubing reactors. The study shows that this versatile process can be used on a mix of waste plastics in a variety of recycled forms to obtain a uniform graphitic carbon phase, hence addressing the challenges of separation and transportation faced by the plastic recycling industry. The conversion yield to elemental carbon for recycled plastics was improved by up to 250% by using graphene oxide (GO) additives. Five different grades of GO and graphene were used to gain insights into the mechanisms of interaction between plastics and GO during pyrolysis. The effect of GO additives on carbonization was analyzed using thermogravimetric analysis/differential scanning calorimetry and ReaxFF-based reactive molecular dynamics simulations. The obtained cokes were graphitized at 2500 °C and the graphitic quality of the synthetic graphites was analyzed using X-ray diffraction, transmission electron microscopy, and Raman spectroscopy. The plasticwaste-derived synthetic graphites exhibit remarkable graphitic quality with crystallite sizes comparable with a model graphitizable material−anthracene coke. The thin, flake-like morphology and nanostructure featuring well-stacked contiguous lamellae make these graphitic carbons highly promising candidates for energy storage applications. Based on our experiments and atomistic-scale simulations, we propose interaction mechanisms between the plastic polymers and the graphenic additives that explain the chemical conversion pathways for GO-assisted waste plastic carbonization and graphitization.

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Section: Introductionmentioning

confidence: 99%

Upcycling Plastic Waste into Graphite Using Graphenic Additives for Energy Storage: Yield, Graphitic Quality, and Interaction Mechanisms via Experimentation and Molecular Dynamics

Gharpure,

Kowalik,

Vander Wal

et al. 2024

ACS Sustainable Chem. Eng.

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The chemistry of chemical recycling of solid plastic waste via pyrolysis and gasification: State-of-the-art, challenges, and future directions

Dogu

Pelucchi

Vijver

et al. 2021

Progress in Energy and Combustion Science

349

234

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Population Balance Modeling: Current Status and Future Prospects

Ramkrishna

Singh²

2014

Annu. Rev. Chem. Biomol. Eng.

201

126

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Population balance modeling is undergoing phenomenal growth in its applications, and this growth is accompanied by multifarious reviews. This review aims to fortify the model's fundamental base, as well as point to a variety of new applications, including modeling of crystal morphology, cell growth and differentiation, gene regulatory processes, and transfer of drug resistance. This is accomplished by presenting the many faces of population balance equations that arise in the foregoing applications.

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Distribution Kinetics of Plastics Decomposition

Cited by 4 publications

References 50 publications

Upcycling Plastic Waste into Graphite Using Graphenic Additives for Energy Storage: Yield, Graphitic Quality, and Interaction Mechanisms via Experimentation and Molecular Dynamics

Upcycling Plastic Waste into Graphite Using Graphenic Additives for Energy Storage: Yield, Graphitic Quality, and Interaction Mechanisms via Experimentation and Molecular Dynamics

The chemistry of chemical recycling of solid plastic waste via pyrolysis and gasification: State-of-the-art, challenges, and future directions

Population Balance Modeling: Current Status and Future Prospects

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