Abstract The catalytic pyrolysis of different types of polyolefin and multilayer packaging based plastic wastes in the presence of commercial zeolite catalyst was studied in the batch pilot scale reactor. Different types of multi-layer plastics such as biaxial oriented polypropylene (BOPP), metalized biaxial oriented polypropylene layers (MET/BOPP), poly ethylene terepthalate (PET), metalized polyethylene-terepthalate (MET/PET), PET combined polyethylene (PET/PE) and mixed polyolefin plastic wastes obtained from the municipal corporation were pyrolyzed to determine the oil, gas and char distribution. BOPP based plastic waste exhibited higher oil yield and calorific value (65–70%, 45.14 KJ/g) compared to PET based MLPs (17.8 %, 30 KJ/g) and laminated metalized plastics (13 %, 37 KJ/g). Modifying the feed composition by mixing of polyolefins-based waste plastics with PET based MLPs and BOPP/MET BOPP doubled the liquid yield and notably altered the physicochemical characterization of the resulted pyrolysis oil. Char yield in the polyolefins-based waste is observed to be lesser than the MLP based waste plastics. GC–MS analysis revealed the percentage area of hydrocarbons compounds of the pyrolysis oil obtained from PET based MLP experiments contains high fractions of medium and heavier range hydrocarbons (C11 – C20, C21 – C30). Sulfur content in the oil from different MLPs was measured as below the detection limit. Functional groups of hydrocarbons of oil were analyzed using FT-IR. Solids were characterized for the presence of heavy metals such as Al, Cr, Cu, Co, Pd, and Ni.

中文翻译：

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聚烯烃和多层包装废塑料的催化热解：中试研究

摘要 在分批中试规模反应器中研究了在商业沸石催化剂存在下不同类型聚烯烃和多层包装塑料废物的催化热解。不同类型的多层塑料，如双向拉伸聚丙烯 (BOPP)、金属化双向拉伸聚丙烯层 (MET/BOPP)、聚对苯二甲酸乙二醇酯 (PET)、金属化聚对苯二甲酸乙二醇酯 (MET/PET)、PET 复合聚乙烯 (PET/ PE）和从市政公司获得的混合聚烯烃塑料废物被热解以确定油、气和焦炭的分布。与基于 PET 的 MLP (17.8%, 30 KJ/g) 和层压金属化塑料 (13%, 37 KJ/g) 相比，基于 BOPP 的塑料废料表现出更高的油产率和热值 (65-70%, 45.14 KJ/g)。通过将基于聚烯烃的废塑料与基于 PET 的 MLP 和 BOPP/MET BOPP 混合来修改进料成分，使液体产量翻了一番，并显着改变了所得热解油的物理化学特性。观察到基于聚烯烃的废物中的焦炭产率低于基于 MLP 的废塑料。GC-MS 分析显示，从基于 PET 的 MLP 实验中获得的热解油的碳氢化合物的百分比面积包含高比例的中重范围碳氢化合物（C11 – C20、C21 – C30）。来自不同 MLP 的油中的硫含量被测量为低于检测限。使用 FT-IR 分析油中烃的官能团。固体的特征在于是否存在重金属，例如 Al、Cr、Cu、Co、Pd 和 Ni。