Thermal Analysis on the Pyrolysis of Tetrabromobisphenol A and Electric Arc Furnace Dust Mixtures

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-017-1121-7· OSTI ID:22858101

Al-Harahsheh, Mohammad; Al-Otoom, Awni; Al-Jarrah, Muhannad ^[1]; Altarawneh, Mohammednoor ^[2]; Kingman, Sam ^[3]

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1. Jordan University of Science and Technology, Chemical Engineering Department (Jordan)
2. Murdoch University, School of Engineering and Information Technology (Australia)
3. University of Nottingham, Faculty of Engineering (United Kingdom)

The pyrolysis of Tetrabromobisphenol A (TBBPA) mixed with electric arc furnace dust (EAFD) was studied using thermogravimetric analysis (TGA) and theoretically analyzed using thermodynamic equilibrium calculations. Mixtures of both materials with varying TBBPA loads (1:1 and 1:3) were prepared and pyrolyzed in a nitrogen atmosphere under dynamic heating conditions at heating rates of 5 and 10 °C/min. The mixtures degraded through several steps, including decomposition of TBBPA yielding mainly HBr, bromination of metal oxides, followed by their evaporation in the sequence of CuBr{sub 3}, ZnBr{sub 2}, PbBr{sub 2}, FeBr{sub 2}, MnBr{sub 2}, KBr, NaBr, CaBr{sub 2}, and MgBr{sub 2}, and finally reduction of the remaining metal oxides by the char formed from decomposition of TBBPA. Thermodynamic calculations suggest the possibility of selective bromination of zinc and lead followed by their evaporation, leaving iron in its oxide form, while the char formed may serve as a reduction agent for iron oxides into metallic iron. However, at higher TBBPA volumes, iron bromide forms, which can also be evaporated at a temperature higher than those of ZnBr{sub 2} and PbBr{sub 2}. Results from this work provide practical insight into selective recovery of valuable metals from EAFD while at the same time recycling the hazardous bromine content in TBBPA.

• OSTI ID: 22858101
• Journal Information: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science Journal Issue: 1 Vol. 49; ISSN 1073-5615; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ARC FURNACES
BROMINATION
BROMINE
CALCIUM BROMIDES
CONTROLLED ATMOSPHERES
DUSTS
ELECTRIC ARCS
HEATING RATE
HYDROBROMIC ACID
IRON
IRON BROMIDES
IRON OXIDES
LEAD
LEAD BROMIDES
MAGNESIUM BROMIDES
MANGANESE BROMIDES
MATERIALS RECOVERY
MIXTURES
NITROGEN
POTASSIUM BROMIDES
PYROLYSIS
RECYCLING
SODIUM BROMIDES
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMICS
ZINC
ZINC BROMIDES