研究报告
李超,刘新民,耿启金,郭庆杰,李金惠.热重质谱联用研究废旧汽车高聚物热解特性[J].环境科学学报,2011,31(8):1724-1729
热重质谱联用研究废旧汽车高聚物热解特性
- Pyrolysis study of scrap automotive polymers with TG-MS technique
- 基金项目：清华大学固体废物处理与环境安全教育部重点实验室开放基金课题(No.swmes 2009-05);山东省自然科学杰出青年基金(No.JQ200904)
- 作者
- 单位
- 李超
- 青岛科技大学化工学院,山东省清洁化工过程重点实验室,青岛 266042
- 刘新民
- 青岛科技大学化工学院,山东省清洁化工过程重点实验室,青岛 266042
- 耿启金
- 青岛科技大学化工学院,山东省清洁化工过程重点实验室,青岛 266042
- 郭庆杰
- 青岛科技大学化工学院,山东省清洁化工过程重点实验室,青岛 266042
- 李金惠
- 清华大学环境系,固体废物处理与环境安全教育部重点实验室,北京 100084
- 摘要：采用热重-质谱(TG-MS)联用技术研究了N2气氛下废旧汽车塑料和橡胶高聚物混合物料热解气体的种类和产生机理.结果表明,废旧汽车高聚物热解过程在240~350 ℃和420~500 ℃有两个明显失重阶段,分别有20.9%和28.3%的挥发分析出.650~730 ℃范围失重峰是由无机填料热分解造成的,产生的挥发性气体产物为CO2.热解过程中所产生的H2、CH4、H2O和CO2等气体的大量释放阶段均在260~500 ℃温度范围.CO2和SO2有多个析出峰出现,CH4、H2O、NH3、HCN的析出特性曲线仅有一个峰,CH4相对其他气体析出温度偏高.
- Abstract：The pyrolysis behavior of scrap automotive polymers was investigated by coupled thermogravimetric analysis/mass spectrometry (TG-MS).The gas products produced throughout the thermal decomposition process are presented.For the pyrolysis of automotive polymers, there were two dramatic weight loss stages at temperatures ranging from 240 ℃ to 350 ℃, and from 420 ℃ to 500 ℃, where 20.9% and 28.3% of the volatile components were released, respectively.Furthermore, H2, CH4, H2O and CO2 were released significantly at the temperature ranging from 260 ℃ to 500 ℃.A moderate weight loss peak occurred from 650 ℃ to 730 ℃, caused by the thermal decomposition of inorganic filler.However, the high heating value gases such as H2 and CH4 were released continuously.The emission curves of CO2 and SO2 were characterized by several peaks, while one peak occurred in the emission curves of CH4, H2O, NH3 and HCN.CH4 had a higher release temperature compared with other gases.
- Key words：automotive polymer materials TG-MS pyrolysis methane
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