The effective recycling of waste printed circuit boards (WPCBs) can conserve resources and reduce environmental pollution. This study explores the pyrolysis and combustion characteristics of WPCBs in various atmospheres through thermogravimetric and Gaussian fitting analyses. Furthermore, this study analyses the pyrolysis products and combustion processes of WPCBs through thermogravimetric and Fourier transform infrared analyses (TG–FTIR) and thermogravimetry–mass spectrometry (TG–MS). Results show that the pyrolysis and combustion processes of WPCBs do not constitute a single reaction, but rather an overlap of multiple reactions. The pyrolysis and combustion process of WPCBs is divided into multiple reactions by Gaussian peak fitting. The kinetic parameters of each reaction are obtained by the Coats–Redfern method. In an argon atmosphere, pyrolysis consists of the overlap of the preliminary pyrolysis of epoxy resin, pyrolysis of small organic mo-lecules, and pyrolysis of brominated flame retardants. The thermal decomposition process in the O2 atmosphere is mainly divided into two re-actions: brominated flame retardant combustion and epoxy combustion. This study provided the theoretical basis for pollution control, process optimization, and reactor design of WPCBs pyrolysis.

Kang Yan;Chongwei Liu;Liping Liu;Min Xiong;Jiongtong Chen;Zhongtang Zhang;Shuiping Zhong;Zhifeng Xu;Jindi Huang

School of Metallurgy Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification,Ganzhou 341000,China;Key Laboratory of Ionic Rare Earth Resources and Environment,Ministry of Natural Resources,Ganzhou 341000,China;Jiangxi College of Applied Technology,Ganzhou 341000,China

矿物冶金与材料学报

[1]Kang Yan;Chongwei Liu;Liping Liu;Min Xiong;Jiongtong Chen;Zhongtang Zhang;Shuiping Zhong;Zhifeng Xu;Jindi Huang-.Pyrolysis behaviour and combustion kinetics of waste printed circuit boards)[J].矿物冶金与材料学报,2022(09):1722-1732

WPCBs,lecules

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