Abstract:Liquefaction properties of waste electrical plastic containing brominated flame retardant (BFR) in supercritical isopropanol were investigated. Results indicated that the plastic was degraded to oil, gas and solid residue. Simultaneously, BFR was debrominated. The degradation efficiencies, oil yields, debromination efficiencies and oil composition were significantly influenced by reaction time, solid/solvent ratio and solvent filling ratio. Under the optimum conditions (temperature: 400℃, reaction time: 60min, solid/solvent ratio: 1/10, solvent filling ratio: 50%), the oil yield and debromination efficiency were 60% and 95.3%, respectively. The oil was composed of benzene substances and phenolic compounds without organobromine compounds. The calorific value of oil was 37.5MJ/kg. The mechanism of treatment of plastic containing BFR was proposed: BFR was firstly abstracted by supercritical fluid and then decomposed in the fluid; the plastic was also decomposed at higher temperature.
王彦民, 张付申, 宋凤敏, 刘智峰, 李琛. 废弃电子塑料在超临界异丙醇中的液化特性[J]. 中国环境科学, 2014, 34(12): 3142-3149.
WANG Yan-Min, ZHANG Fu-Shen, SONG Feng-Min, LIU Zhi-Feng, LI Chen. Liquefaction properties of waste electrical plastic in supercritical isopropanol. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(12): 3142-3149.