Studies on Bromination and Evaporation of Zinc Oxide during Thermal Treatment with TBBPA
Studies on Bromination and Evaporation of Zinc Oxide during Thermal Treatment with TBBPA
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DOI：
10.1021/es802400y
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发表时间：
2009-02-15
影响因子：
11.4
通讯作者：
Nakamura, Takashi
中科院分区：
文献类型：
--
作者：
Grabda, Mariusz;Oleszek-Kudlak, Sylwia;Nakamura, Takashi
热力学考虑表明，贱金属氧化物如ZnO、PbO、Cu 2 O等应容易与HBr（四溴双酚A（TBBPA）热分解的主要气态产物）反应，以形成适合于挥发性分离的低沸点金属溴化物。本工作采用差示扫描量热仪和实验室炉研究了TBBPA热分解溴化ZnO的反应范围和反应条件。通过X射线衍射分析、电子探针微量分析、电感耦合等离子体分析、离子色谱法和气相色谱-质谱联用分析所形成的固体、冷凝和气态产物。在这项研究中得到的结果表明，溴化的ZnO发生在272摄氏度（DSC）和290摄氏度以上（炉）的有效性为41，64，和81%的依赖：实验条件。所形成的ZnBr 2的挥发在340 ℃下开始，并且在650 ℃下具有45%的产率。该产率相当于在本实验条件下混合物中初始锌含量的28-36%。
Thermodynamic considerations indicate that base metal oxides such as ZnO, PbO, Cu2O, etc. should easily react with HBr, the main gaseous product from the thermal decomposition of tetrabromobisphenol A (TBBPA), to form low boiling point metallic bromides suitable for volatile separation. In this work a differential scanning calorimeter and laboratory-scale furnace was used to investigate the scope and conditions for the bromination of ZnO by the thermal decomposition of TBBPA. The formed solid, condensed, and gaseous products 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 in this study indicate that the bromination of ZnO occurred at 272 degrees C (DSC) and above 290 degrees C (furnace) with an effectiveness of 41, 64, and 81% dependent: on the experimental conditions. Volatilization of the formed ZnBr2 began at 340 degrees C and had a 45% yield at 650 degrees C. This yield corresponded to 28-36% of the original zinc content in the mixture under the present experimental conditions.