Abstract As the amount of waste plastic increases, thermo-chemical conversion of plastics provides an economic flexible and environmental friendly method to manage recycled plastics, and generate valuable materials, such as carbon nanotubes (CNTs). The choice of catalysts and reaction parameters are critical to improving the quantity and quality of CNTs production. In this study, a ceramic membrane catalyst (Ni/Al 2 O 3 ) was studied to control the CNTs growth, with reaction parameters, including catalytic temperature and Ni content investigated. A fixed two-stage reactor was used for thermal pyrolysis of plastic waste, with the resulting CNTs characterized by various techniques including scanning electronic microscopy (SEM), transmitted electronic microscopy (TEM), temperature programmed oxidation (TPO), and X-ray diffraction (XRD). It is observed that different loadings of Ni resulted in the formation of metal particles with various sizes, which in turn governs CNTs production with varying degrees of quantity and quality, with an optimal catalytic temperature at 700 °C.

中文翻译：

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使用镍/陶瓷基催化剂从废塑料热化学转化生产碳纳米管

摘要 随着废塑料数量的增加，塑料的热化学转化提供了一种经济灵活且环境友好的方法来管理再生塑料，并产生有价值的材料，如碳纳米管 (CNTs)。催化剂和反应参数的选择对于提高碳纳米管生产的数量和质量至关重要。在这项研究中，研究了陶瓷膜催化剂（Ni/Al 2 O 3 ）来控制碳纳米管的生长，并研究了反应参数，包括催化温度和镍含量。固定式两级反应器用于塑料废物的热解，所得碳纳米管通过各种技术表征，包括扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、程序升温氧化 (TPO) 和 X 射线衍射(XRD)。