Analysis of Products from Thermal Decomposition of Waste Computer Mainboard
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摘要: 采用热重分析仪-傅立叶变换红外光谱仪(TG-FTIR)、管式炉试验系统、气相色谱仪-质谱仪(GC-MS)等研究了电脑主板的热解特性和热处理产物.研究结果表明:废电脑主板热解过程剧烈失重阶段为300~460℃,该温度段约失重20%,加热至600℃后失重非常缓慢.废电脑主板热解产物中既有含8~15个C原子的苯酚等芳香族化合物,也有1~4个C原子的小分子有机化合物,且热解过程中还产生多种含溴有机物;这些热解产物来源于废电脑主板中有机聚合物和四溴双酚A的分解.Abstract: The pyrolysis characteristics and thermal decomposition products of waste computer mainboards were investigated by the TG-FTIR(thermogravimetric analyzer-Fourier transform infrared spectroscopy),a duct-furnace pyrolysis system and the GC-MS(gas chromatography-mass spectrometer).The results show that waste computer mainboards have an acute mass loss from 300 to 460℃ and about 20% of mass is lost at this stage,and the loss velocity over 600℃ is very slow.The thermal decomposition products of a waste computer mainboard include aromatic compounds comprised of 8 to 15 carbon atoms such as phenol,organic compounds with 1 to 4 carbon atoms and bromized organic compounds.These products mainly come from the decomposition of the organic polymer and tetrabromobisphenol A in waste computer mainboards.
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Key words:
- waste computer /
- mainboard /
- brominated flame retardant /
- pyrolysis
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