废旧电路板的热解行为及燃烧动力学

严康; 刘重伟; 刘丽萍; 熊民; 陈炯彤; 张忠堂; 衷水平; 徐志峰; 黄金堤

doi:10.1007/s12613-021-2299-x

Volume 29 Issue 9

Sep. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(9): 1722-1732

Kang Yan, Chongwei Liu, Liping Liu, Min Xiong, Jiongtong Chen, Zhongtang Zhang, Shuiping Zhong, Zhifeng Xu, and Jindi Huang, Pyrolysis behaviour and combustion kinetics of waste printed circuit boards, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp. 1722-1732. https://doi.org/10.1007/s12613-021-2299-x

Cite this article as:

Kang Yan, Chongwei Liu, Liping Liu, Min Xiong, Jiongtong Chen, Zhongtang Zhang, Shuiping Zhong, Zhifeng Xu, and Jindi Huang, Pyrolysis behaviour and combustion kinetics of waste printed circuit boards, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp. 1722-1732. https://doi.org/10.1007/s12613-021-2299-x

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研究论文

废旧电路板的热解行为及燃烧动力学

1)
江西理工大学冶金工程学院, 赣州341000, 中国
2)
赣州市绿色冶金与过程强化工程技术研究中心, 赣州341000, 中国
3)
江西应用技术职业学院, 赣州341000, 中国
4)
自然资源部离子型稀土资源与环境重点实验室, 赣州 341000, 中国

通讯作者:
徐志峰 E-mail: xzf_1@163.com

黄金堤 E-mail: hjd041@163.com

文章亮点

（1）研究了废旧电路板在不同气氛下的热解和燃烧特性。

（2）通过分峰拟合的方法研究了废旧电路板在氩气和氧气气氛下的复杂反应过程。

（3）通过Coats~Redlfern法求取了废旧电路板在不同气氛下的反应机理和动力学参数。

中文摘要

对废旧电路板进行高效的资源化利用，不仅可以节约资源，还可以减少其对环境的污染。本文通过热重法和高斯拟合分析相结合的方法，研究了废旧电路板在不同气氛下的热解行为和燃烧特性。通过热重–傅里叶变换红外技术和热重–质谱分析技术对废旧电路板的热解产物和燃烧过程进行了分析。研究结果表明：废旧电路板的热解和燃烧过程不是单一反应，而是由多个反应重叠的过程；采用高斯峰拟合方法将热解燃烧过程划分为多个反应过程。在氩气气氛下，热解过程包括环氧树脂预热解、有机小分子热解和溴化阻燃剂热解的多个反应重叠过程。在氧气气氛下，热解过程主要分为溴化阻燃燃烧和环氧树脂燃烧两种反应。研究通过分峰拟合和Coats–Redlfern求取了不同气氛下每个反应的反应机理和动力学参数，为废旧电路板热解过程的污染控制、工艺优化和反应器设计提供理论依据。

关键词:

Research Article

Pyrolysis behaviour and combustion kinetics of waste printed circuit boards

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Abstract

Abstract

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 molecules, and pyrolysis of brominated flame retardants. The thermal decomposition process in the O₂ atmosphere is mainly divided into two reactions: brominated flame retardant combustion and epoxy combustion. This study provided the theoretical basis for pollution control, process optimization, and reactor design of WPCBs pyrolysis.
- waste printed circuit board;
- pyrolysis mechanism;
- combustion;
- Gauss;
- peak fitting

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