【Paper】
Decomposition Behavior of Flame Retardant Plastics Containing Brominated Flame Retardant and Trioxide Antimony
Yasumasa Yamazaki*, Shoji Ozawa**, Yoshihiro Kojima** and Hitoki Matsuda**
* Department of Energy and Engineering, Graduate of School Engineering, Nagoya University
** Research Center for Advanced Waste and Emission Management, Nagoya University
† Correspondence should be addressed to Hitoki Matsuda:
Research Center for Advanced Waste and Emission
Management, Nagoya University
（Furo-cho, Chikusa-ku Nagoya, 464-8603 Japan）

Abstract
The behavior of bromine, antimony and carbon during thermal decomposition process with nitrogen and steam was investigated for fundamental study toward chemical recycling of flame retardant plastics containing brominated flame retardant and trioxide antimony, in nitrogen or steam atmosphere at 573〜973K. Under the current experimental conditions, flammable gases such as methane and ethane were present in pyrolysis gas, and about 60％ of bromine and 90％ of antimony were transferred to the liquid phase and existed mainly as SbBr3. However, another portion of bromine in the liquid product was in the form of organic bromide such as 1-bromo ethyl benzene. When the temperature of the system was set at 973K in a 40％ steam atmosphere, debromination of the organic bromide compound was increased in comparison with the decomposition in a nitrogen atmosphere and about 80％ of the organic bromide compounds were converted to inorganic compounds of bromine.

Key words: flame retardant plastics, brominated flame retardant, trioxide antimony, pyrolysis, steam