Thermal degradation of acrylonitrile-butadiene-styrene (ABS) containing flame retardants using a fluidized bed reactor: The effects of Ca-based additives on halogen removal

Su Hwa Jung, Seon Jin Kim, Joo Sik Kim

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Abstract

In this study, the thermal degradation of a waste fraction of acrylonitrile-butadiene-styrene containing brominated flame retardants was performed to reduce halogen content in the pyrolysis oil. Thermal degradation was completed using Ca-based additives (calcium oxide, calcium hydroxide and oyster shells) in a bench-scale pyrolysis plant equipped with a fluidized bed reactor and char separation system. Pyrolysis was carried out in a temperature range of 430-510°C. In the absence of any additive, the oil yield amounted to about 77 wt.%. With the additives, the oil yield was markedly reduced to within a range of 45-64 wt.%. The principle compounds in the oils were toluene, ethylbenzene, styrene, cumene, α-methylstyrene, phenol and heteroatom-containing compounds. When Ca(OH) 2 was applied, total bromine and chlorine contents in the oil decreased to 0.05 and 0.04 wt.%, respectively. In addition, Ca(OH) 2 reduced the antimony content in the oil to below 0.001 ppm. Most of the halogens and antimony in the feed material were present in the char obtained after pyrolysis.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalFuel Processing Technology
Volume96
DOIs
StatePublished - Apr 2012

Keywords

  • Additives
  • Dehalogenation
  • Flame-retardant
  • Fluidized bed
  • Pyrolysis

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