Recovery of benzene-rich oil from the degradation of metal- and metal-o xide-containing poly (ethylene terephthalate) composites
Recovery of benzene-rich oil from the degradation of metal- and metal-o xide-containing poly (ethylene terephthalate) composites
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从含金属和金属氧化物的聚对苯二甲酸乙二醇酯复合材料的降解中回收富含苯的油
DOI：
10.1007/s10163-013-0194-x
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Toshiaki Yoshioka.
中科院分区：
文献类型：
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作者：
Shogo Kumagai;Guido Grause;Tomohito Kameda;Toshiaki Yoshioka.
在Ca(OH)2存在下，采用管式反应器对纯聚对苯二甲酸乙酯（PET）树脂和含金属/金属氧化物的PET复合材料进行了热分解。考察了间歇处理和连续处理、Ca(OH)2的存在、PET粒度对苯生产的影响。在Ca(OH)2存在下，在700℃条件下，使用小PET颗粒时，苯的收率和纯度分别达到82.9%和78.8%；此外，连续进料反应器优于间歇式反应器。PET与Ca(OH)2的有效接触在PET降解过程中起重要作用，促进了PET的水解和对苯二甲酸的脱羧，而抑制了热解。此外，PET基废物的热分解结果（PET基x射线薄膜、磁带和预付卡）表明，在Ca(OH)2存在下，废物中所含的金属和金属氧化物对PET降解和富苯油的回收没有显著的催化作用。
Pure poly(ethylene terephthalate) (PET) resin and metal-/metal oxide-containing PET composites were thermally decomposed in the presence of Ca(OH)2using a tube reactor. The effects of batch and continuous processing, the presence of Ca(OH)2, and PET size on benzene production were investigated. A maximum benzene yield and purity of 82.9 % and 78.8 wt%, respectively, were obtained at 700 °C in the presence of Ca(OH)2when using small PET particles; further, a continuous feed reactor was favored over a batch reactor. Effective contact between PET and Ca(OH)2was important in the PET degradation, which promoted hydrolysis of PET and decarboxylation of terephthalic acid, whereas pyrolysis was suppressed. Furthermore, the results of thermal decomposition of PET-based waste—PET-based X-ray films, magnetic tape, and prepaid cards—indicated that the metal and metal oxides contained in the waste had no significant catalytic effect on PET degradation or on the recovery of benzene-rich oil in the presence of Ca(OH)2.