Siddiqui Mohammad Nahid
Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia.
J Hazard Mater. 2009 Aug 15;167(1-3):728-35. doi: 10.1016/j.jhazmat.2009.01.042. Epub 2009 Jan 20.
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-cm(3) micro-autoclave reactor. The optimum conditions selected for this study were: 5% AIBN by weight of total plastics, 60 min, 650 psi and 420 degrees 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.
偶氮二异丁腈（AIBN）引发剂被用于处理国内使用最广泛的塑料，以替代催化剂。在氮气氛围下，分别对低密度聚乙烯（LDPE）、高密度聚乙烯（HDPE）、聚丙烯（PP）、聚对苯二甲酸乙二酯（PET）和聚苯乙烯（PS）塑料与偶氮二异丁腈进行热解。在一个25立方厘米的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占塑料总重量的5%、60分钟、650磅力/平方英寸和420摄氏度。发现HDPE、LDPE、PP发生了最大程度的裂解，并产生了最多的液态和气态产物。PET和PS塑料与AIBN的热解产生了相对大量的不溶性有机物质。在其他反应中，固定比例的混合塑料与AIBN一起热解，得到了优异的液态烃产率。这一结果表明，在塑料热解中使用AIBN时，产物的液态部分有非常显著的增加。在塑料热解中使用AIBN似乎是可行的，并且是一种环境友好的替代催化过程的方法，可用于大量生产液态燃料或化学原料。
