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首页> 外文会议>Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES) >FEEDSTOCK RECYCLING OF ELECTRIC AND ELECTRONIC WASTE PLASTICS: FUNDAMENTAL INVESTIGATION FOR FEASIBILITY STUDIES
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FEEDSTOCK RECYCLING OF ELECTRIC AND ELECTRONIC WASTE PLASTICS: FUNDAMENTAL INVESTIGATION FOR FEASIBILITY STUDIES

机译：电气和电子废塑料的进料回收：可行性研究的基础研究

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In the present investigation, we report the feedstock recycling of two major waste plastics from WEEE i.e., high impact polystyrene (HIPS) and acrylonitrile butadiene styrene copolymer with various brominated flame-retardants. The pyrolysis of heating impact polystyrene (HIPS-Br) with various brominated flame retardants at 430℃ into fuel oil. Iron oxide carbon composite catalyst (Fe-C) was used for catalytic debromination of liquid products. The effect of antimony oxide (Sb_2O_3: synergist) in HIPS-Br containing decabromo diphenyl oxide (DDO) and decabromo diphenyl ethane (DDE) as flame retardant was investigated. The thermal degradation of HIPS-Br produced various brominated hydrocarbons and also hydrobromic acid (HBr) in addition to various hydrocarbons. The synergist (Sb_2O_3) reacted with the hydrogen bromide evolved during the pyrolysis process and formed the SbBR_3 in the liquid products. The presence of bromine content (organic and inorganic) in liquid products is not desirable to use as a fuel oil. The use of iron oxide carbon composite catalyst (Fe-C) during pyrolysis debrominated (ca. 99%) the bromine compounds from liquid products. The presence of Sb_2O_3 (5 wt%) decreased both the hydrogen bromide and brominated hydrocarbons by forming SbBft and produced high quantity of lower hydrocarbons (C_7-C_(11)). The thermal degradation of brominated flame retardant (Br: 9.59 wt%) containing Acrylonitrile-Butadiene-Styrene copolymer (ABS-Br; 10 g) was carried out at 450℃ using a semi batch operation using two different temperature programs. The heating rate was found to affect the quality of the degradation oil and yield of products (liquid, gas and residue). Data on the effect of the temperature program on the accumulation of liquid products was presented. It was found that the majority of the bromine was concentrated in the carbon residue and while majority of the nitrogen accumulates in the liquid products irrespective of degradation mode. The use of a one step constant heating rate process produced a higher liquid yield (39%), than a two step process (29%). Differences were also noted in the Br and N contained in the liquids produced by the two processes.
机译：在本次调查中，我们报告了WEEE中两种主要废塑料的原料回收利用，即高抗冲聚苯乙烯（HIPS）和具有各种溴化阻燃剂的丙烯腈丁二烯苯乙烯共聚物。热冲击聚苯乙烯（HIPS-Br）和各种溴化阻燃剂在430℃下热解为燃料油。氧化铁碳复合催化剂（Fe-C）用于液体产品的催化脱溴。研究了氧化锑（Sb_2O_3：增效剂）在含有十溴二苯醚（DDO）和十溴二苯乙烷（DDE）作为阻燃剂的HIPS-Br中的作用。 HIPS-Br的热降解产生了各种溴化烃以及氢溴酸（HBr）。增效剂（Sb_2O_3）与在热解过程中生成的溴化氢反应，并在液体产物中形成SbBR_3。液体产品中溴含量（有机和无机）的存在不适合用作燃料油。在热解过程中使用氧化铁碳复合催化剂（Fe-C）从液体产品中脱溴（约99％）的溴化合物。 Sb_2O_3（5 wt％）的存在通过形成SbBft减少了溴化氢和溴化烃，并生成了大量的低级烃（C_7-C_（11））。含丙烯腈-丁二烯-苯乙烯共聚物（ABS-Br； 10 g）的溴化阻燃剂（Br：9.59 wt％）在450℃下使用两个不同的温度程序进行半间歇操作进行热降解。发现加热速率影响降解油的质量和产物（液体，气体和残渣）的产率。给出了温度程序对液体产物积累的影响的数据。已发现，大多数溴浓缩在碳残留物中，而大多数氮则积累在液体产物中，而与降解方式无关。与两步法（29％）相比，使用一步恒速加热工艺可产生更高的液体收率（39％）。两种方法生产的液体中所含的Br和N也存在差异。

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