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Optical emission spectra analysis of thermal plasma treatment of poly(vinyl chloride)

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Fazekas P., Keszler A. M., Bódis E., Drotár E., Klébert S., Károly Z., Szépvölgyi J.
Open Chemistry
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2015
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vol. 13
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issue 1
EN
Decomposition of poly(vinyl chloride) (PVC) was investigated in radiofrequency thermal plasma in neutral, oxidative and reductive conditions. Optical emission spectroscopy (OES) was applied for the characterization of the plasma column. OES was used to identify active plasma components such as excited atoms, ions, radicals and molecules. The spectra were dominated by molecular C2, CN, OH, and CH bands, and atomic H, Ar, C, Cl and O lines. Emission intensities of main species were monitored versus various experimental parameters. The rotational-vibrational temperatures determined from different bimolecular species were considered in the range of 2000–6400 K. Solid soot samples were collected and purified to investigate the possibility of graphene formation as a by-product of the decomposition process.
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