A new mechanism and kinetic analysis for the efficient conversion of inorganic bromide in waste printed circuit board smelting ash via traditional sulfated roasting

doi:10.1016/j.jhazmat.2021.125394

	A new mechanism and kinetic analysis for the efficient conversion of inorganic bromide in waste printed circuit board smelting ash via traditional sulfated roasting
	Wu, Yufeng 1,2; Liu, Gongqi 1,2; Pan, De'an 1,2; Yuan, Haoran 3; Li, Bin 1,2
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2021-07-05
卷号	413 页码:12
关键词	Waste printed circuit board smelting ash Sulfated roasting Debromination Kinetics Reaction mechanism
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2021.125394
通讯作者	Wu, Yufeng(wuyufeng3r@126.com)
英文摘要	The waste printed circuit board smelting ash (WPCB-SA) produced in the waste printed circuit board smelting process is a hazardous material that not only contains valuable metals, but also contains a large amount of toxic and harmful inorganic bromides. The utilization of metals has received considerable attention in previous studies, but the recovery of hazardous bromides requires further study. In this article, a new idea of converting inorganic bromine in WPCB-SA by traditional sulfated roasting is proposed. Debromination kinetics under simulated experimental conditions are discussed, and kinetic equations are established. The kinetic results show that during low-temperature sulfated roasting, the conversion of Br in CuBr and PbBr2 conforms to the chemical reaction diffusion model and diffusion control the product layer model, respectively. A possible reaction mechanism is also proposed. Our research shows that the conversion of Br in CuBr is divided into three processes: covalent bond decomposition, hydrogen ion form acid, copper ion form salt, and HBr oxidation conversion, whereas the conversion of Br in PbBr2 is divided into two processes: sulfuric acid ionization, lead ion form salt and HBr oxidation conversion. This work provides the theoretical basis for the improvement and application of inorganic bromide recovery technology in WPCB-SA.
资助项目	Key Research and Development Plan of Guangdong Province[2019B110209001-4] ; National Key Research and Development Program of China[2018YFC1903104] ; National Key Research and Development Program of China[2018YFC1903603]
WOS关键词	EXTRACTION ; PYROLYSIS ; RECOVERY ; EMISSION ; METAL ; ACID
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000647432700003
资助机构	Key Research and Development Plan of Guangdong Province ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/33166]
专题	中国科学院广州能源研究所
通讯作者	Wu, Yufeng
作者单位	1.Beijing Univ Technol, Inst Circular Econ, Beijing 100124, Peoples R China 2.Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yufeng,Liu, Gongqi,Pan, De'an,et al. A new mechanism and kinetic analysis for the efficient conversion of inorganic bromide in waste printed circuit board smelting ash via traditional sulfated roasting[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,413:12.
APA	Wu, Yufeng,Liu, Gongqi,Pan, De'an,Yuan, Haoran,&Li, Bin.(2021).A new mechanism and kinetic analysis for the efficient conversion of inorganic bromide in waste printed circuit board smelting ash via traditional sulfated roasting.JOURNAL OF HAZARDOUS MATERIALS,413,12.
MLA	Wu, Yufeng,et al."A new mechanism and kinetic analysis for the efficient conversion of inorganic bromide in waste printed circuit board smelting ash via traditional sulfated roasting".JOURNAL OF HAZARDOUS MATERIALS 413(2021):12.