Effect of heating rate on the pyrolysis of high-impact polystyrene containing brominated flame retardants: Fate of brominated flame retardants

Guido Grause, Daiki Karakita, Tomohito Kameda, Thallada Bhaskar, Toshiaki Yoshioka

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In the case of plastics containing brominated flame retardants, various brominated organic compounds, including polybrominated dibenzodioxins and dibenzofurans, are yielded when they are degraded. In order to reduce the hazard that might be generated during after-live treatment, the behaviour of flame retarded high-impact polystyrene containing decabromo diphenylether and antimony oxide (Sb2O3), was investigated using several heating programs. It was found that the separation of the thermal process into two steps divided at 330 °C makes it possible to obtain an oil fraction rich in brominated compounds at low temperatures and an oil fraction depleted in brominated compounds at high temperatures. The low temperature oil contained a high concentration of SbBr3 and dibromodibenzofurans. Various brominated compounds with a low volatility and 1-bromo-1-phenylethane from the reaction of HBr with styrene were among the substances in the high temperature oil. The concentration of brominated compounds was reduced from 6 wt% for degradation in a single step to below 1 wt% in the high temperature oil in the two step process.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
JournalJournal of Material Cycles and Waste Management
Volume14
Issue number3
DOIs
Publication statusPublished - 2012 Sep

Keywords

  • Antimony oxide
  • Brominated dibenzofurans
  • Decabromo diphenylether
  • Pyrolysis
  • Temperature program
  • WEEE

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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