Conversion of hazardous plastic wastes into useful chemical products.
Conversion of hazardous plastic wastes into useful chemical products.
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DOI：
10.1016/j.jhazmat.2009.01.042
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发表时间：
2009-08
影响因子：
13.6
通讯作者：
M. Siddiqui
中科院分区：
文献类型：
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作者：
M. Siddiqui
采用偶氮异丁腈（AIBN）引发剂代替催化剂处理国内最广泛使用的塑料。用偶氮异丁腈分别对低密度聚乙烯（LDPE）、高密度聚乙烯（HDPE）、聚丙烯（PP）、聚对苯二甲酸乙二醇酯（PET）和聚苯乙烯（PS）塑料进行了热裂解实验。在25-cm 3微型高压釜反应器中进行了一系列单一（塑料/AIBN）和二元（混合塑料/AIBN）反应。本研究选择的最佳条件为：AIBN占塑料总量的5%、60 min、650 psi和420°C。结果表明，HDPE、LDPE、PP发生最大程度的裂解，产生最高量的液体和气体产物。PET和PS塑料与AIBN的热解提供了相对显着量的不溶性有机物。在其他反应中，固定比例的混合塑料与AIBN一起热解，提供了优异的液体烃产率。该结果表明，在塑料热解中使用AIBN时，产物的液体部分非常显著地增加。在塑料热解中使用AIBN似乎是可行的，并且是催化过程的环境友好的替代方案，用于最大化液体燃料或更高量的化学原料。
Azoisobutylnitrile (AIBN) initiator was used in the treatment of most widely used domestic plastics in lieu of catalysts. The pyrolysis of low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), poly-ethylene terephthalate (PET) and polystyrene (PS) plastics with azoisobutylnitrile was carried out individually under nitrogen atmosphere. A series of single (plastic/AIBN) and binary (mixed plastics/AIBN) reactions were carried out in a 25-cm3micro-autoclave reactor. The optimum conditions selected for this study were: 5% AIBN by weight of total plastics, 60min, 650psi and 420°C. It was found that HDPE, LDPE, PP underwent to a maximum cracking and produced highest amounts of liquid and gaseous products. Pyrolysis of PET and PS plastics with AIBN afforded comparatively significant amount of insoluble organic materials. In other reactions, fixed ratios of mixed plastics were pyrolyzed with AIBN that afforded excellent yields of liquid hydrocarbons. This result shows a very significant increase in the liquid portions of the products on using AIBN in the pyrolysis of plastics. The use of AIBN in the pyrolysis of plastics is seems to be feasible and an environmental friendly alternative to catalytic process for maximizing the liquid fuels or chemical feed stocks in higher amounts.