Detoxification of brominated pyrolysis oils

A. Hornung, A.I. Balabanovich, S. Donner, H. Seifert

Research output: Contribution to journalArticlepeer-review

Abstract

The development of an innovative technology for the pyrolytic conversion of brominated phenols in a reductive medium aimed at product recovery for commercial use is discussed in this paper. Brominated phenols are toxic products, which contaminate pyrolysis oil of wastes from electronic and electrical equipment (WEEE). The pyrolysis experiments were carried out with 2,6-dibromophenol, tetrabromobisphenol A, WEEE pyrolysis oil and polypropylene or polyethylene in encapsulated ampoules under inert atmosphere in quasi-isothermal conditions (300-400 °C) with a different residence time (10-30 min). Optimal conditions were found to be the use of polypropylene at 350 °C with a residence time of 20 min. The main pyrolysis products were identified as HBr and phenol. A radical debromination mechanism for the pyrolytic destruction of brominated phenols is suggested.
Original languageEnglish
Pages (from-to)723-733
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume70
Issue number2
DOIs
Publication statusPublished - Dec 2003

Keywords

  • pyrolisis
  • debrominated
  • brominated phenols
  • polypropylene
  • polyethylene
  • WEEE

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