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Valorization of the plastic residue from a WEEE treatment plant by pyrolysis.
Waste Management ( IF 8.1 ) Pub Date : 2020-05-28 , DOI: 10.1016/j.wasman.2020.05.022
Luca Esposito 1 , Lorenzo Cafiero 1 , Doina De Angelis 1 , Riccardo Tuffi 1 , Stefano Vecchio Ciprioti 2
Affiliation  

The possibility of a pyrolysis process as a mean of recycling the residual plastic rich fraction (WEEE residue) derived from of a material recovery facility has been evaluated. The unknown product composition of WEEE residue has been supposed through coupled thermal – infrared analysis and ultimate analysis and resulted as PP 3 wt%, PBT 3 wt%, PVC 4 wt%, styrene-based polymers (principally ABS) 50 wt%, thermosetting resins (principally, epoxy/phenolic resins) 24 wt%, inorganic fraction (principally fiber glass) 16 wt%. DSC experiments showed that the overall energy, defined as the degradation heat, needed in order to completely degrade WEEE residue was about 4% of the exploitable energy of the input material. The effect of temperature and different zeolite catalysts were investigated, in particular in terms of yield and quality of the produced oils during the pyrolysis process. Produced oils were potentially exploitable as fuels and almost all catalysts improved their quality. The best performance was reached by NaUSY(5.7) with the second highest production of light oil and the greatest total monoaromatics yield, plus 12 wt% in comparison to thermal pyrolysis experiments. Furthermore, light oil produced by NaUSY(5.7) has one of the best LHV (36 MJ/kg) and no halogenated compounds were detected by GC–MS analysis. Char or pyrolytic gas combustion could supply the energy required for the thermal degradation of WEEE Residue.



中文翻译:

通过热解对WEEE处理厂中的塑料残留物进行估价。

已经评估了热解工艺作为回收材料回收设施产生的残余富塑料馏分(WEEE残留物)的手段的可能性。WEEE残留物的未知产品成分已通过热-红外分析和最终分析相结合,得出的结果为:PP 3 wt%,PBT 3 wt%,PVC 4 wt%,苯乙烯基聚合物(主要是ABS)50 wt%,热固性树脂(主要是环氧/酚醛树脂)为24重量%,无机部分(主要是玻璃纤维)为16重量%。DSC实验表明,完全降解WEEE残留物所需的总能量(定义为降解热)约为输入材料可利用能量的4%。研究了温度和不同沸石催化剂的影响,特别是在热解过程中所产生的油的产率和质量方面。成品油有可能被用作燃料,几乎所有的催化剂都能提高其质量。NaUSY(5.7)达到了最佳性能,轻油产量第二高,单芳烃总收率最高,与热裂解实验相比增加了12 wt%。此外,NaUSY(5.7)生产的轻油具有最好的LHV之一(36 MJ / kg),并且GC-MS分析未检测到卤代化合物。焦炭或热解气体燃烧可以提供WEEE残留物热降解所需的能量。7)与热裂解实验相比,轻油产量第二高,单芳烃总收率最高,再加上12 wt%。此外,NaUSY(5.7)产生的轻油具有最好的LHV之一(36 MJ / kg),并且GC-MS分析未检测到卤代化合物。焦炭或热解气体燃烧可以提供WEEE残留物热降解所需的能量。7)与热裂解实验相比,轻油产量第二高,单芳烃总收率最高,再加上12 wt%。此外,NaUSY(5.7)产生的轻油具有最好的LHV(36 MJ / kg)之一,并且GC-MS分析未检测到卤代化合物。焦炭或热解气体燃烧可以提供WEEE残留物热降解所需的能量。

更新日期:2020-05-28
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