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Waste print circuit board containing 11.38% Br was pyrolyzed in vacuum.Thermal stability of waste print circuit board was studied under vacuum condition by thermo-gravimetry(TG). Vacuum pyrolysis of WPCB was studied emphasizing on the kinetics of WPCB pyrolysis reactions. Based on the TG results, a kinetic model was proposed. Kinetic parameters were calculated for reaction with this model including all stages of decomposition. The average activation energy is 68 kJ/mol with reaction order 3. These findings provide new insights into the WPCB thermal decomposition and useful data for rational design and operation of pyrolysis. 相似文献
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采用热重分析仪和固定床热解反应器对废旧电路板进行了低真空条件下的热分解实验.研究了混合废旧电路板在真空下的降解特性、热解动力学以及热解条件对热解产品产率的影响,并讨论了真空和氮气条件下电路板热解的差异.实验结果表明真空降低了电路板热解的表观活化能,提高了热解产物的挥发性,减少了二次裂解反应,因而真空有利于提高液体产品的产率,降低气体和固体产品的产率.废旧电路板的真空热解液体产品主要由酚、烷基酚、双酚A、水以及各种溴酚构成,液体中总溴高达13.47%,其中一半左右以有机溴的形式存在,因此液体产品适合用于分离提取化工原料而不宜用于作燃料. 相似文献
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