2013 Fiscal Year Final Research Report
Physical chemistry of bromide metals for an advanced recycling of rare metals
| Project/Area Number |
23246158
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Recycling engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SHIBATA Etsuro 東北大学, 多元物質科学研究所, 准教授 (70312650)
IIZUKA Atsushi 東北大学, 多元物質科学研究所, 助教 (70451862)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 金属臭素化物 / 臭素系難燃剤 / 蒸気圧 / クヌッセンセル |
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| Research Abstract |
In this study, vapor pressures and thermodynamic data such as standard sublimation enthalpy for bromide metals were obtained using a Knudsen cell apparatus, assuming to a metal recycling process from waste electric and electronic equipment by a pyro-metallurgical process. Vapor pressures of copper bromide, zinc bromide and lead bromide were measured, and their vapor species were identified using a mass spectrometry. Thermal decompositions of brominated flame retardant (BFR) plastics and simultaneous brominating reactions of mixed metal compounds were investigated using a small electric furnace. In the experiments, BFRs such as TBBPA and plastics containing BFR were mixed with metal compounds or electric arc furnace (EAF) dust. The thermal decomposition mechanisms of BFRs and bromide vaporization behaviors of metal compounds were investigated in the experiments.
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