Zhao Chunhu, Zhang Xiaoping, Shi Lin
Faculty of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China.
Faculty of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, Guangdong, China.
Waste Manag. 2017 Mar;61:354-361. doi: 10.1016/j.wasman.2016.12.019. Epub 2016 Dec 24.
In the present work, pyrolysis and catalytic pyrolysis of waste printed circuit boards (WPCBs) was carried out in the coupling of Thermo Gravimetric Analysis and Fourier Transform Infrared Spectroscopy (TG-FTIR) under nitrogen atmosphere. The reaction temperature was increased from 30 to 700°C, while the heating rates were varied from 10 to 40°C/min. Experimental results show that the effect of catalyst on the WPCBs particles pyrolysis was significance. Compared with another two combustion-supporting agents (MgO, CaO), the whole pyrolysis process was optimized when the catalyst ZSM-5 was added into the WPCBs particles. The distributed activation energy model (DAEM) was used to analyze the kinetic parameters of the WPCBs pyrolysis. It was found that values of frequency factor (k) changed with different activation energy (E) values during pyrolysis process. The activation energy values range from 129.15 to 280.53kJ/mol, and the frequency factor values range from 9.02×10 to 4.21×10s. The generated major products for the catalytic pyrolysis of WPCBs were H, CO, CO, HO, phenols and aromatics.
在本研究中，废弃印刷电路板（WPCBs）的热解和催化热解在氮气气氛下通过热重分析与傅里叶变换红外光谱联用（TG-FTIR）进行。反应温度从30℃升至700℃，加热速率在10至40℃/min之间变化。实验结果表明，催化剂对WPCBs颗粒热解的影响显著。与另外两种助燃剂（MgO、CaO）相比，当在WPCBs颗粒中添加催化剂ZSM-5时，整个热解过程得到优化。采用分布活化能模型（DAEM）分析WPCBs热解的动力学参数。研究发现，在热解过程中，频率因子（k）的值随不同的活化能（E）值而变化。活化能值范围为129.15至280.53kJ/mol，频率因子值范围为9.02×10至4.21×10s。WPCBs催化热解产生的主要产物为H、CO、CO、HO、酚类和芳烃。
