The significant surge in global plastic waste has fundamentally shifted the traditional perceptions of plastic as a material. This shift can largely be attributed to established linear economy practices. While plastics offer numerous advantages, their postuse management has been grossly overlooked, resulting in ubiquitous plastic waste. In a circular economy framework for plastics, it is essential to methodically collect and recycle waste, rejuvenating the material for reuse. In this research, a model mixture of polymers, simulating household plastic waste, underwent thermochemical conversion to pyrolysis oil, priming it for the creation of new plastic products. Pyrolysis experiments utilized a bench-scale continuous fluidized bed reactor, employing various slags from the aluminum and steel industries as catalysts. All slags reduced the halogen content in the pyrolysis oil by 90 w/w% compared to the noncatalytic variant. Specifically, red mud further cracked the wax into lighter hydrocarbons, which is more suitable as a feed in the refinery. In parallel to the pyrolysis work, hydrotreatment experiments were conducted in a fixed bed reactor with the noncatalytic pyrolysis oil using 0.5 w/w% Pd/Al₂O₃ and 78 w/w% NiO/Al₂O₃ as catalysts to evaluate the halogen removal. Results indicated that the halogen content obtained by hydrotreatment was at the same level as that in the catalytic pyrolysis.

中文翻译：

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旨在工业再利用的混合塑料的催化加工

全球塑料垃圾的大幅增加从根本上改变了人们对塑料作为材料的传统看法。这种转变很大程度上归因于既定的线性经济实践。虽然塑料具有许多优点，但其使用后管理却被严重忽视，导致塑料废物无处不在。在塑料循环经济框架中，有必要有条不紊地收集和回收废物，使材料焕发活力以供再利用。在这项研究中，模拟家用塑料废物的聚合物模型混合物经过热化学转化为热解油，为创造新的塑料产品奠定了基础。热解实验利用小型连续流化床反应器，采用铝和钢铁工业的各种炉渣作为催化剂。与非催化变体相比，所有炉渣将热解油中的卤素含量降低了 90 w/w%。具体来说，赤泥进一步将蜡裂解成更轻的碳氢化合物，更适合作为炼油厂的进料。与热解工作并行，在固定床反应器中使用非催化热解油进行加氢处理实验，使用 0.5 w/w% Pd/Al ₂ O ₃和 78 w/w% NiO/Al ₂ O ₃作为催化剂，以评估卤素去除。结果表明，加氢处理得到的卤素含量与催化热解得到的卤素含量相同。