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废弃电子塑料在超临界异丙醇中的液化特性
引用本文: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.
作者姓名:王彦民  张付申  宋凤敏  刘智峰  李琛
作者单位:陕西理工学院化学与环境科学学院;中国科学院生态环境研究中心;
基金项目:陕西理工学院人才启动项目(SLGQD135)
摘    要:研究了废弃含溴化阻燃剂的电子塑料在超临界异丙醇中的液化特性.研究结果表明塑料在超临界异丙醇中发生了解聚,产生油、气以及固体残渣,塑料中的溴化阻燃剂发生了脱溴降解.反应时间、固/液比、溶剂填充度对塑料解聚及阻燃剂脱溴降解影响较大,在最佳工艺条件(温度:400℃,反应时间:60min,固/液比:1/10,溶剂填充度:50%)下获得60%的产油率及95.3%的脱溴率.油以苯系物及酚类物质为主要组成物质,其热值为37.5MJ/kg.超临界异丙醇处理含溴化阻燃剂塑料主要包括溴化阻燃剂的萃取、脱溴降解和塑料高温解聚等过程.

关 键 词:超临界流体  电子塑料  液化  脱溴  

Liquefaction properties of waste electrical plastic in supercritical isopropanol
WANG Yan-Min,ZHANG Fu-Shen,SONG Feng-Min,LIU Zhi-Feng,LI Chen.Liquefaction properties of waste electrical plastic in supercritical isopropanol[J].China Environmental Science,2014,34(12):3142-3149.
Authors:WANG Yan-Min  ZHANG Fu-Shen  SONG Feng-Min  LIU Zhi-Feng  LI Chen
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.
Keywords:supercritical fluid  electrical plastic  liquefaction  debromination  
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