Vaccum Pyrolysis of TV Housings in a Two-Step Reaction System
The pyrolysis of flame retarded TV housings (high impact polystyrene, HIPS) containing heptabromodiphenyl ether(H7BDE) and.octabromodiphenyl ether (O8BDE) was performed under controlled temperature programmed pyrolysis conditions (two steps) to understand the decomposition behaviour and evolution of brominated hydrocarbons from the two polybromodiphenyl ethers. The heating rate of the controlled pyrolysis procedure was defined by thermogravimetry test. The liquid products were analysed by gas chro-matographs equipped with mass selective detector. The inorganic bromine was analysed by ion chromato-graph. The pyrolysis of the samples in two steps significantly affected the composition of brominated hydrocarbons and the concentration of main decomposition products. The results indicated that about 80％ bromine evolved in the form of HBr. GC/MS analysis confirmed that the organobromine compounds were mainly in step 1 liquid products leaving less brominated hydrocarbons in the step 2 liquid products. Although the main pyrolysis products in both steps were the same, the concentration had great differences.
HIPS polybromodiphenyl ethers pyrolysis vaccum WEEE plastics
Yuan CHEN Lieqiang CHEN Jinhui LI
School of Environment, Tsinghua University, Beijing, China, 100084 Chemistry and Chemical Engineering Department, South China University of Technology, Guangzhou, Chin
国际会议
The Sixth International Conference on Waste Management and Technology(第六届固体废物管理与技术国际会议 ICWMT 6)
苏州
英文
344-348
2011-08-30（万方平台首次上网日期，不代表论文的发表时间）