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Waste-to-Energy: Production of Fuel Gases from Plastic Wastes.

ABSTRACT: A new mechanochemical method was developed to convert polymer wastes, polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), to fuel gases (H2, CH4, and CO) under ball-milling with KMnO4 at room temperature. By using various solid-state characterizations (XPS, SEM, EDS, FTIR, and NMR), and density functional theory calculations, it was found that the activation followed the hydrogen atom transfer (HAT) mechanism. Two metal oxidant molecules were found to abstract two separate hydrogen atoms from the α-CH and β-CH units of substrates, [-βCH2-αCH(R)-]n, where R = H in PE, R = γCH3 in PP, and R = Cl in PVC, resulting in a di-radical, [-βCH•-αC•(R)-]. Subsequently, the two unpaired electrons of the di-radical were recombined into an alkene intermediate, [-βCH = αC(R)-], which underwent further oxidation to produce H2, CH4, and CO gases.

SUBMITTER: Chow CF

PROVIDER: S-EPMC8588166 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Waste-to-Energy: Production of Fuel Gases from Plastic Wastes.

Chow Cheuk-Fai CF Lam Chow-Shing CS Lau Kai-Chung KC Gong Cheng-Bin CB

Polymers 20211025 21

A new mechanochemical method was developed to convert polymer wastes, polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), to fuel gases (H2, CH4, and CO) under ball-milling with KMnO4 at room temperature. By using various solid-state characterizations (XPS, SEM, EDS, FTIR, and NMR), and density functional theory calculations, it was found that the activation followed the hydrogen atom transfer (HAT) mechanism. Two metal oxidant molecules were fou ...[more]

PMID: 34771229

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Dataset Information

Waste-to-Energy: Production of Fuel Gases from Plastic Wastes.

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Waste-to-Energy: Production of Fuel Gases from Plastic Wastes.

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