Vaporization of zinc during thermal treatment of ZnO with tetrabromobisphenol A (TBBPA)

Mariusz Grzegorz Grabda, Sylwia Oleszek-Kudlak, Etsuro Shibata, Takashi Nakamura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In the present work we investigate the vaporization of zinc or its compounds during thermal treatment of ZnO with tetrabromobisphenol A. Samples of 2g of ZnO:TBBPA (3.34:1) were isothermally heated in a laboratory-scale furnace at temperatures from 490°C to 950°C, and the solid, condensed and gaseous products formed were analyzed by X-ray diffraction analysis, electron probe microanalysis, inductively coupled plasma analysis, ion chromatography, and gas chromatography coupled with mass spectrometry. The results obtained indicate that the vaporization of ZnBr2 formed strongly depends on heating time and temperature, yet is restrained by char, if formed with sufficient yield (above 15wt%). Starting from 850°C, this char commences carbothermic reduction of any remaining ZnO, which from then begins to evaporate as zinc metal vapor. Volatilization of zinc is completed at 950°C. The presence of 5vol.% of oxygen has no significant effect on the vaporization of formed ZnBr2, the carbothermic reduction or the volatilization of metallic zinc. Strongly oxidizing conditions (20vol.% of oxygen), however, boost the oxidation of char and thus the vaporization of ZnBr2, but prevent carbothermic reduction of any un-reacted ZnO by depleting this char.

Original languageEnglish
Pages (from-to)473-479
Number of pages7
JournalJournal of Hazardous Materials
Volume187
Issue number1-3
DOIs
Publication statusPublished - 2011 Mar 15
Externally publishedYes

Fingerprint

Volatilization
vaporization
Vaporization
Zinc
Trout
Hot Temperature
zinc
Heat treatment
Carbothermal reduction
volatilization
oxygen
ion chromatography
electron probe analysis
Oxygen
Electron Probe Microanalysis
Ion chromatography
gas chromatography
Temperature
mass spectrometry
temperature

Keywords

  • EAF dust
  • Simultaneous recycling
  • TBBPA decomposition
  • Waste BFRs-plastics
  • Zinc bromide vaporization
  • Zinc separation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Vaporization of zinc during thermal treatment of ZnO with tetrabromobisphenol A (TBBPA). / Grabda, Mariusz Grzegorz; Oleszek-Kudlak, Sylwia; Shibata, Etsuro; Nakamura, Takashi.

In: Journal of Hazardous Materials, Vol. 187, No. 1-3, 15.03.2011, p. 473-479.

Research output: Contribution to journalArticle

Grabda, Mariusz Grzegorz ; Oleszek-Kudlak, Sylwia ; Shibata, Etsuro ; Nakamura, Takashi. / Vaporization of zinc during thermal treatment of ZnO with tetrabromobisphenol A (TBBPA). In: Journal of Hazardous Materials. 2011 ; Vol. 187, No. 1-3. pp. 473-479.
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