Enhanced dehalogenation and coupled recovery of complex electronic display housing plastics by sub/supercritical CO2

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 固体废弃物处理与资源化实验室

	Enhanced dehalogenation and coupled recovery of complex electronic display housing plastics by sub/supercritical CO2
	Zhang, Cong-Cong; Zhang, Fu-Shen
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-01-15
卷号	382 页码:1-8
关键词	Halogen-containing plastics Supercritical carbon dioxide Dehalogenation Chemical recycling
ISSN号	0304-3894
英文摘要	Electronic display housing plastics contain a high amount of halogenated compounds such as brominated flame retardants (BFRs) and polyvinyl chloride (PVC). Compared with moderate critical conditions of conventional eco-friendly sub/supercritical carbon dioxide (Sc - CO2), a novel and sustainable procedure by using improved Sc - CO2 was developed for disposal of this type of plastic. The main merit of the process was that complex halogen-containing plastics were safely disposed and halogen-free products were recycled without using catalysts or additives. It was discovered that additive BFRs were initially extracted by Sc - CO2 technique and then it decomposed accompanied with PVC rapidly to form HBr and HCl, which could be separated by traditional bromine stripping techniques from seawater. Based on response surface methodology (RSM), the maximum debromination and dechlorination efficiencies were achieved at 99.51% and 99.12% respectively. After the treatment, halogen-free products such as solid carbon materials and organic chemical feedstocks were obtained. Mechanism study elucidated that free radicals reaction involving chain initiation, growth and termination induced the polymer decomposition to form these products. This study provides an applicable and green approach for disposal and recovery of halogen-containing plastics.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44566]
专题	生态环境研究中心_固体废弃物处理与资源化实验室
推荐引用方式 GB/T 7714	Zhang, Cong-Cong,Zhang, Fu-Shen. Enhanced dehalogenation and coupled recovery of complex electronic display housing plastics by sub/supercritical CO2[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,382:1-8.
APA	Zhang, Cong-Cong,&Zhang, Fu-Shen.(2020).Enhanced dehalogenation and coupled recovery of complex electronic display housing plastics by sub/supercritical CO2.JOURNAL OF HAZARDOUS MATERIALS,382,1-8.
MLA	Zhang, Cong-Cong,et al."Enhanced dehalogenation and coupled recovery of complex electronic display housing plastics by sub/supercritical CO2".JOURNAL OF HAZARDOUS MATERIALS 382(2020):1-8.