Decomposition of poly(vinyl chloride) in inductively coupled radiofrequency thermal plasma

Péter Fazekas, Zsuzsanna Czégény, János Mink, Eszter Bódis, Szilvia Klébert, Csaba Németh, Anna Mária Keszler, Zoltán Károly, János Szépvölgyi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Decomposition of poly(vinyl chloride) (PVC) was studied in inductively coupled radiofrequency thermal plasma in neutral, oxidative and reductive conditions. The exhaust gases were analysed by Fourier transform infrared spectroscopy (FT-IR), and their main components were identified as CO, CO2, C2H2, H2O and HCl. The weaker bands in the infrared spectra were assigned by density function theory calculations and P-R separation method. The extent of PVC decomposition was calculated from the amount of solid soot, which was also studied by transmission electron microscopy (TEM) for morphology and composition. Organic compounds adsorbed on the surface of the soot were extracted by toluene and analysed by gas chromatography mass spectrometry (GC/MS). The extracts comprised of various polycyclic aromatic hydrocarbons (PAHs) and their methylated and chlorinated derivatives. Their amount was greatly affected by the experimental conditions. The presence of oxygen decreased the formation of PAHs, while it increased the formation of polychlorinated PAH compounds. In the presence of hydrogen PAH formation was observed. However, dioxin or furan derivatives were not detected in the decomposition products.

Original languageEnglish
Pages (from-to)163-171
Number of pages9
JournalChemical engineering journal
Volume302
DOIs
Publication statusPublished - Oct 15 2016

Keywords

  • Fourier transform infrared spectroscopy
  • Gas chromatography/mass spectrometry
  • Poly(vinyl chloride)
  • Polymer waste
  • Radiofrequency thermal plasma
  • Thermal decomposition

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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