Pyrolysis treatment of nonmetal fraction of waste printed circuit boards: Focusing on the fate of bromine

doi:10.1177/0734242X19894621

	Pyrolysis treatment of nonmetal fraction of waste printed circuit boards: Focusing on the fate of bromine
	Xiong, Jingjing 1; Yu, Shaoqi 1; Wu, Daidai 2; Lue, Xiaoshu 3,4,5; Tang, Junhong 1; Wu, Weihong 1; Yao, Zhitong 1
刊名	WASTE MANAGEMENT & RESEARCH
	2020-01-06
页码	8
关键词	Electronic waste waste printed circuit boards brominated flame retardant flame retardant plastics pyrolysis
ISSN号	0734-242X
DOI	10.1177/0734242X19894621
通讯作者	Yao, Zhitong(sxyzt@126.com)
英文摘要	Advanced thermal treatment of electronic waste offers advantages of volume reduction and energy recovery. In this work, the pyrolysis behaviour of nonmetallic fractions of waste printed circuit boards was studied. The fate of a bromine and thermal decomposition pathway of nonmetallic fractions of waste printed circuit boards were further probed. The thermogravimetric analysis showed that the temperatures of maximum mass loss were located at 319 degrees C and 361 degrees C, with mass loss of 29.6% and 50.6%, respectively. The Fourier transform infrared Spectroscopy analysis revealed that the spectra at temperatures of 300 degrees C-400 degrees C were complicated with larger absorbance intensity. The nonmetallic fractions of waste printed circuit boards decomposed drastically and more evolved products were detected in the temperature range of 600 degrees C-1000 degrees C. The gas chromatography-mass spectrometry analysis indicated that various brominated derivates were generated in addition to small molecules, such as CH4, H2O and CO. The release intensity of CH4 and H2O increased with temperature increasing and reached maximum at 600 degrees C-800 degrees C and 400 degrees C-600 degrees C. More bromoethane (C2H5Br) was formed as compared with HBr and methyl bromide (CH3Br). The release intensity of bromopropane (C3H7Br) and bromoacetone (C3H5BrO) were comparable, although smaller than that of bromopropene (C3H5Br). More dibromophenol (C6H4Br2O) was released than that of bromophenol (C6H5BrO) in the thermal treatment. During the thermal process, part of the ether bonds first ruptured forming bisphenol A, propyl alcohol and tetrabromobisphenol A. Then, the tetrabromobisphenol A decomposed into C6H5BrO and HBr, which further reacted with small molecules forming brominated derivates. It implied debromination of raw nonmetallic fractions of waste printed circuit boards or pyrolysis products should be applied for its environmentally sound treating.
资助项目	National Natural Science Foundation of China[21911530766] ; National Natural Science Foundation of China[51911530460] ; National Natural Science Foundation of China[51606055] ; Zhejiang Provincial Natural Science Foundation of China[LY19B070008]
WOS关键词	THERMAL-DECOMPOSITION ; GRAPHENE ; RECOVERY ; NITROGEN ; PLASTICS ; METALS
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	SAGE PUBLICATIONS LTD
WOS记录号	WOS:000507192800001
资助机构	National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26414]
专题	中国科学院广州能源研究所
通讯作者	Yao, Zhitong
作者单位	1.Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Xiasha High Educ Pk, Hangzhou 310018, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China 3.Univ Vaasa, Dept Elect Engn & Energy Technol, Vaasa, Finland 4.Aalto Univ, Dept Civil Engn, Espoo, Finland 5.Jilin Univ, Construct Engn Coll, Changchun, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Jingjing,Yu, Shaoqi,Wu, Daidai,et al. Pyrolysis treatment of nonmetal fraction of waste printed circuit boards: Focusing on the fate of bromine[J]. WASTE MANAGEMENT & RESEARCH,2020:8.
APA	Xiong, Jingjing.,Yu, Shaoqi.,Wu, Daidai.,Lue, Xiaoshu.,Tang, Junhong.,...&Yao, Zhitong.(2020).Pyrolysis treatment of nonmetal fraction of waste printed circuit boards: Focusing on the fate of bromine.WASTE MANAGEMENT & RESEARCH,8.
MLA	Xiong, Jingjing,et al."Pyrolysis treatment of nonmetal fraction of waste printed circuit boards: Focusing on the fate of bromine".WASTE MANAGEMENT & RESEARCH (2020):8.