期刊
CHEMICAL ENGINEERING JOURNAL
卷 302, 期 -, 页码 163-171出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.05.044
关键词
Poly(vinyl chloride); Polymer waste; Thermal decomposition; Radiofrequency thermal plasma; Fourier transform infrared spectroscopy; Gas chromatography/mass spectrometry
资金
- National Development Agency of Hungary [KTIA_AIK_12-1-2012-0004]
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 HCI. 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. (C) 2016 Elsevier B.V. All rights reserved.
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