Thermal Plasma Decomposition of Tetrachloroethylene

  • Péter Fazekas
  • Zsuzsanna Czégény
  • János Mink
  • Pál Tamás Szabó
  • Anna Mária Keszler
  • Eszter Bódis
  • Szilvia Klébert
  • János Szépvölgyi
  • Zoltán Károly
Original Paper
  • 27 Downloads

Abstract

Tetrachloroethylene (C2Cl4) has been used widely as a solvent and dry cleaning agent, but was later specified as possible human carcinogen. As a result, its safe treatment became a priority. In this paper, we report on its decomposition in an atmospheric radiofrequency thermal plasma reactor. Main components of the exhaust gases were determined by Fourier transform infrared spectroscopy. We found that complete decomposition can be achieved in either oxidative or reductive conditions but not in neutral one. The solid soot product was characterised by transmission electron microscopy and specific surface area measurement. Organic compounds adsorbed on the surface of the soot were extracted by toluene and comprised, based on gas chromatography mass spectrometry, of various perchlorinated aliphatic (for example hexachlorocyclopentadiene) and aromatic compounds (like hexachlorobenzene, octachloronaphthalene or octachloroacenaphthylene). Several nitrogen containing molecules were also identified whose presence are rare during thermal plasma treatments. Further investigation of the extract by mass spectrometry revealed various higher molar mass chlorinated carbon clusters and two types of fullerenes (C60 and C70).

Keywords

Tetrachloroethylene Thermal decomposition Radiofrequency thermal plasma Waste management 

Notes

Acknowledgements

The authors are grateful to Miklós Prodán and Gábor Babos for their technical assistance. Furthermore, we would like to thank Csaba Németh and Péter Németh for their contribution to the FT-IR and TEM measurements, respectively.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Péter Fazekas
    • 1
  • Zsuzsanna Czégény
    • 1
  • János Mink
    • 1
  • Pál Tamás Szabó
    • 2
  • Anna Mária Keszler
    • 1
  • Eszter Bódis
    • 1
  • Szilvia Klébert
    • 1
  • János Szépvölgyi
    • 1
  • Zoltán Károly
    • 1
  1. 1.Institute of Materials and Environmental Chemistry, Research Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary
  2. 2.MS Metabolomics Laboratory, Core Facility, Research Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary

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