TG and TG-MS methods for studies of the reaction between metal oxide and brominated flame retardant in various atmospheres

Sylwia Oleszek; Mariusz Grzegorz Grabda; Etsuro Shibata; Takashi Nakamura

doi:10.1016/j.tca.2011.09.014

TG and TG-MS methods for studies of the reaction between metal oxide and brominated flame retardant in various atmospheres

Sylwia Oleszek^*, Mariusz Grzegorz Grabda, Etsuro Shibata, Takashi Nakamura

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

TG and TG-MS measurements were used to investigate the reactivity of ZnO with HBr originating from thermal degradation of TBBPA and with SbBr ₃ under various atmospheres. It was found, that the HBr is an excellent brominating agent for ZnO and separates zinc as a volatile bromide (50 and 70% in He and He + 5 vol% O ₂, respectively) from the solid residue. In inert atmosphere the formed char plays an important role as reduction agent for remaining ZnO into metallic Zn, which vaporizes completely from the residue above 890 °C. In presence of oxygen, the char is oxidized into CO and CO ₂ and un-reacted ZnO remains. Bromination efficiency from thermal treatment of SbBr ₃ + ZnO in He is about 14% only. Such low efficiency may results from highly volatile SbBr ₃ sublimating from the mixture above 100 °C and its high ability to form thermally stable oxybromide compound (Sb ₈O ₁₁Br ₂). Simultaneous TG-MS measurements indicate that the presence of ZnO strongly influences the TBBPA degradation pathway and causes enhancement of char formation. Catalyzing effect of ZnO on evaporation of SbBr ₃ was also observed.

Original language	English
Pages (from-to)	13-21
Number of pages	9
Journal	Thermochimica Acta
Volume	527
DOIs	https://doi.org/10.1016/j.tca.2011.09.014
Publication status	Published - 2012 Jan 10
Externally published	Yes

Keywords

BFR plastics recycling
TBBPA degradation
Thermal analysis
Zinc oxide bromination
Zinc recovery

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Instrumentation

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10.1016/j.tca.2011.09.014

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title = "TG and TG-MS methods for studies of the reaction between metal oxide and brominated flame retardant in various atmospheres",

abstract = "TG and TG-MS measurements were used to investigate the reactivity of ZnO with HBr originating from thermal degradation of TBBPA and with SbBr 3 under various atmospheres. It was found, that the HBr is an excellent brominating agent for ZnO and separates zinc as a volatile bromide (50 and 70% in He and He + 5 vol% O 2, respectively) from the solid residue. In inert atmosphere the formed char plays an important role as reduction agent for remaining ZnO into metallic Zn, which vaporizes completely from the residue above 890 °C. In presence of oxygen, the char is oxidized into CO and CO 2 and un-reacted ZnO remains. Bromination efficiency from thermal treatment of SbBr 3 + ZnO in He is about 14% only. Such low efficiency may results from highly volatile SbBr 3 sublimating from the mixture above 100 °C and its high ability to form thermally stable oxybromide compound (Sb 8O 11Br 2). Simultaneous TG-MS measurements indicate that the presence of ZnO strongly influences the TBBPA degradation pathway and causes enhancement of char formation. Catalyzing effect of ZnO on evaporation of SbBr 3 was also observed.",

keywords = "BFR plastics recycling, TBBPA degradation, Thermal analysis, Zinc oxide bromination, Zinc recovery",

author = "Sylwia Oleszek and Grabda, {Mariusz Grzegorz} and Etsuro Shibata and Takashi Nakamura",

year = "2012",

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doi = "10.1016/j.tca.2011.09.014",

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T1 - TG and TG-MS methods for studies of the reaction between metal oxide and brominated flame retardant in various atmospheres

AU - Oleszek, Sylwia

AU - Grabda, Mariusz Grzegorz

AU - Shibata, Etsuro

AU - Nakamura, Takashi

PY - 2012/1/10

Y1 - 2012/1/10

N2 - TG and TG-MS measurements were used to investigate the reactivity of ZnO with HBr originating from thermal degradation of TBBPA and with SbBr 3 under various atmospheres. It was found, that the HBr is an excellent brominating agent for ZnO and separates zinc as a volatile bromide (50 and 70% in He and He + 5 vol% O 2, respectively) from the solid residue. In inert atmosphere the formed char plays an important role as reduction agent for remaining ZnO into metallic Zn, which vaporizes completely from the residue above 890 °C. In presence of oxygen, the char is oxidized into CO and CO 2 and un-reacted ZnO remains. Bromination efficiency from thermal treatment of SbBr 3 + ZnO in He is about 14% only. Such low efficiency may results from highly volatile SbBr 3 sublimating from the mixture above 100 °C and its high ability to form thermally stable oxybromide compound (Sb 8O 11Br 2). Simultaneous TG-MS measurements indicate that the presence of ZnO strongly influences the TBBPA degradation pathway and causes enhancement of char formation. Catalyzing effect of ZnO on evaporation of SbBr 3 was also observed.

AB - TG and TG-MS measurements were used to investigate the reactivity of ZnO with HBr originating from thermal degradation of TBBPA and with SbBr 3 under various atmospheres. It was found, that the HBr is an excellent brominating agent for ZnO and separates zinc as a volatile bromide (50 and 70% in He and He + 5 vol% O 2, respectively) from the solid residue. In inert atmosphere the formed char plays an important role as reduction agent for remaining ZnO into metallic Zn, which vaporizes completely from the residue above 890 °C. In presence of oxygen, the char is oxidized into CO and CO 2 and un-reacted ZnO remains. Bromination efficiency from thermal treatment of SbBr 3 + ZnO in He is about 14% only. Such low efficiency may results from highly volatile SbBr 3 sublimating from the mixture above 100 °C and its high ability to form thermally stable oxybromide compound (Sb 8O 11Br 2). Simultaneous TG-MS measurements indicate that the presence of ZnO strongly influences the TBBPA degradation pathway and causes enhancement of char formation. Catalyzing effect of ZnO on evaporation of SbBr 3 was also observed.

KW - BFR plastics recycling

KW - TBBPA degradation

KW - Thermal analysis

KW - Zinc oxide bromination

KW - Zinc recovery

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TG and TG-MS methods for studies of the reaction between metal oxide and brominated flame retardant in various atmospheres

Abstract

Keywords

ASJC Scopus subject areas

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