废旧电路板热解动力学及产物分析

谢奕标

doi:10.12153/j.issn.1674-991X.20190099

废旧电路板热解动力学及产物分析

doi: 10.12153/j.issn.1674-991X.20190099

谢奕标

广东省石油化工职业技术学校

详细信息

中图分类号: X705
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出版历程
- 收稿日期: 2019-06-04
- 刊出日期: 2020-03-20

Research on pyrolysis kinetics and products analysis of waste circuit boards

XIE Yibiao

Guangdong Petrol-Chemical Technology Vocational School

摘要

摘要: 在氮气氛围下,利用热重分析(TGA)对废旧电路板(WPCB)非金属粉末进行热解动力学试验,并利用Py-GC∕MS(pyrolysis-gas chromatoraph∕mass spectrum)和TG(thermo gravimetric)∕MS测试手段对热解产物进行分析。结果表明,WPCB粉末热解过程经历水分蒸发、分解和稳定3个阶段,其中分解阶段包含有机质挥发分解和残渣分解2个过程,其表观活化能分别为250.74和23.58 kJ∕mol,指前因子分别为1.35×10 ³¹和3 428.92 min ^-1。热解产物主要包括苯环取代的芳香族化合物和含溴化合物,此外还包括少量低分子量的碳氢化合物、苯并呋喃等。苯环取代的芳香族化合物主要包括苯、甲苯、乙苯、二甲苯、苯酚、异丙基苯酚;含溴化合物主要包括溴甲烷、溴乙烷、溴苯酚、二溴苯酚、溴化氢。
- 废旧电路板 /
- 热解动力学 /
- 热解产物
Abstract: Under nitrogen condition, thermo gravimetric analysis(TGA) was used to test the pyrolysis characteristics and reaction kinetics of waste printed circuit boards (WPCB) powder. Py-GC∕MS and TG∕MS were used to analyze and discuss the pyrolysis products of WPCB. The results showed that the pyrolysis process of WPCB powder was divided into three stages, including evaporation of water, decomposition of organic matter and stabilization. The decomposition stage included volatilization and decomposition of organic matter and decomposition of residue, whose apparent activation energy was 250.74 and 23.58 kJ∕mol, respectively, and the pre-exponential factors were 1.35×10 ³¹ and 3 428.92 min ^-1, respectively. The main products of the pyrolysis of the WPCB powder included aromatic compounds which mainly substituted by benzene ring-substituted aromatic compounds and bromine-containing compounds, and a small amount of low molecular weight hydrocarbons, benzofurans, etc. The benzene ring-substituted aromatic compounds mainly included benzene, toluene, ethylbenzene, xylene, phenol, isopropyl phenol, while the bromine-containing compounds mainly included methyl bromide, ethyl bromide, bromophenol, dibromophenol and hydrogen bromide.
- waste printed circuit board /
- pyrolysis kinetics /
- pyrolysis product

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参考文献(23)

[1]	IJI M, IKUTA Y . Pyrolysis-based material recovery from molding resin for electronic arts[J]. Journal of Environmental Engineering, 1998,124(9):821-828.
[2]	LUDA M P, BALABANOVICH A I, CAMINA G . Thermal decomposition of fire retardant brominted epoxy resins[J]. Journal of Analytical and Applied Pyrolysis, 2002,65(1):25-40.
[3]	GAO R T, XU Z M . Pyrolysis and utilization of nonmetal materials in waste printed circuit boards:debromination pyrolysis,temperature-controlled condensation,and synjournal of oil-based resin[J]. Journal of Hazardous Materials, 2019,364:1-10.
[4]	MA H T, DU N, LIN X Y , et al. Experimental study on the heat transfer characteristics of waste printed circuit boards pyrolysis[J]. Science of the Total Environment, 2018,633:264-270.
[5]	SHEN Y F . Effect of chemical pretreatment on pyrolysis of non-metallic fraction recycled from waste printed circuit boards[J]. Waste Management, 2018,76:537-543.
[6]	CHEN Y C, WANG H P, LIN K S , et al. Fate of bromine in pyrolysis of printed circuit board wastes[J]. Chemosphere, 2000,40(4):383-387.
[7]	彭绍洪, 陈烈强, 甘舸 , 等. 废旧电路板真空热解[J]. 化工学报, 2006,57(11):2720-2726. PENG S H, CHEN L Q, GAN G , et al. Vacuum pyrolysis of waste printed circuit boards[J]. CIESC Journal, 2006,57(11):2720-2726.
[8]	孙路石, 陆继东, 曾丽 , 等. 印刷线路板热分解动力学特性[J]. 华中科技大学学报(自然科学版), 2001,29(12):40-42. SUN L S, LU J D, ZENG L , et al. Kinetic study on thermal degradation of printed circuit boards[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2001,29(12):40-42.
[9]	彭科, 奚波, 姚强 . 印刷电路板基材的热解实验研究[J]. 环境污染治理技术与设备, 2004,5(5):34-37. PENG K, XI B, YAO Q . An experimental research on pyrolysis of printed circuit board backing[J]. Techniques and Equipment for Environmental Pollution Control, 2004,5(5):34-37.
[10]	熊祖鸿, 李海滨, 吴创之 , 等. 印刷线路板废弃物的热解与动力学实验研究[J]. 环境污染治理技术与设备, 2006,7(10):47-50. XIONG Z H, LI H B, WU C Z , et al. A study on pyrolysis and kinetics of printed circuit boards wastes[J]. Techniques and Equipment for Environmental Pollution Control, 2006,7(10):47-50.
[11]	LONG L S, SUN S Y, ZHONG S , et al. Using vacuum pyrolysis and mechanical processing for recycling waste printed circuit boards[J]. Journal of Hazardous Materials, 2010,177(1∕2∕3):626-632.
[12]	彭绍洪, 陈烈强, 胡亚林 , 等. 碳酸钙存在下废旧电路板热解油的组成特征[J]. 现代化工, 2009,29(11):44-47. PENG S H, CHEN L Q, HU Y L , et al. Study on compositions of pyrolystic tar from waste printed circuit boards mixed with calcium carbonate[J]. Modern Chemical Industry, 2009,29(11):44-47.
[13]	马洪亭, 王明辉, 王芳超 , 等. 典型废旧家电印刷线路板热失重特性和热解动力学模型[J]. 天津大学学报, 2011,44(7):602-606. MA H T, WANG M H, WANG F C , et al. Thermogravimetric characteristics and kinetic modes of printed circuit boards from typical waste life electro-equipments[J]. Journal of Tianjin University, 2011,44(7):602-606.
[14]	张于峰, 郝斌, 郭晓娟 , 等. 废弃印刷线路板热重分析和动力学模型[J]. 燃烧科学与技术, 2008,14(6):506-510. ZHANG Y F, HAO B, GUO X J , et al. Thermogravimetric analysis and kinetic models on pyrolysis of waste printed circuit boards[J]. Journal of Combustion Science and Technology, 2008,14(6):506-510.
[15]	郭晓娟, 张于峰, 秦贯丰 . 废弃印刷线路板热解表观动力学模型研究[J]. 化工进展, 2012,31(11):2395-2399. GUO X J, ZHANG Y F, QIN G F . Kinetic model study on pyrolysis of waste printed circuit board[J]. Chemical Industry and Engineering Progress, 2012,31(11):2395-2399.
[16]	赵跃, 薛勇, 黄强 , 等. 废旧印刷线路板的热重分析及热解动力学模型[J]. 化工环保, 2011,31(6):482-485. ZHAO Y, XUE Y, HUANG Q , et al. Thermo gravimetric analysis and pyrolysis kinetics models of waste printed circuit board[J]. Environmental Protection of Chemical Industry, 2011,31(6):482-485.
[17]	王芳, 刘玉卿, 海热提 . 防溴型环氧树脂电路板热解动力学分析[J]. 化工学报, 2011,62(10):2945-2950. WANG F, LIU Y Q, HAI R T . Pyrolysis kinetics of anti-Br printed circuit boards made epoxy resin[J]. CIESC Journal, 2011,62(10):2945-2950.
[18]	孙立, 张晓东 . 生物质热解气化原理与技术[M]. 北京:化学工业出版社 2013.
[19]	HALL W J, WILLIAMS P T . Separation and recovery of materials from scrap printed circuit boards[J]. Resources,Conservation & Recycling, 2007,51(3):691-709.
[20]	殷进, 李光明, 贺文智 , 等. 废弃印刷线路板非金属热解动力学[J]. 环境工程学报, 2014,8(9):3947-3950. YIN J, LI G M, HE W Z , et al. Pyrolysis kinetics of non-metallic in waste printed circuit boards[J]. Chinese Journal of Environmental Engineering, 2014,8(9):3947-3950.
[21]	胡荣祖, 高胜利, 赵凤起 , 等. 热分析动力学[M]. 北京:科学出版社 2008.
[22]	郝娟, 张洪, 王兴涌 , 等. 煤粉与废线路板混合燃烧特性[J]. 中国矿业大学学报, 2012,41(3):493-503. HAO J, ZHANG H, WANG X Y , et al. Combustion characteristics of the mixture of coal powder and printed circuit board scraps[J]. Journal of China University of Mining & Technology, 2012,41(3):493-503.
[23]	陈楠纬, 孙水裕, 任杰 , 等. 咖啡渣燃烧特性及动力学研究[J]. 环境科学学报, 2015,35(9):2942-2947. CHEN N W, SUN S Y, REN J , et al. Combustion characteristics and kinetics of coffee industrial residues[J]. Acta Scientiae Circumstantiae, 2015,35(9):2942-2947.