Abstract The management of waste hard plastics is a big challenge in the world. Conventional pyrolysis and gasification of hard plastics have been extensively reported. However, producing high values carbon nanotubes as the main product or byproduct from hard plastics has been rarely reported. In this work, we studied and reported this work by using pyrolysis of phenolic formaldehyde resin producing high value carbon nanotubes to promote the economic competitiveness of the technology. The produced carbon nanotubes were characterized by scanning electronic microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and temperature programme oxidation. The yield of CNTs using the Ni catalysts is about 24.07 % and its purity is 93.13 %. Compared with the Ni catalysts, the Fe catalysts have higher yield and purity of CNTs, reaching 34.39 % and 97.45 %, respectively. Through transmission electron microscopy and Raman characterization, it is found that the graphitization quality of CNTs produced from Fe catalysts is higher than that of the CNTs produced from Ni catalysts.

中文翻译：

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硬塑料催化转化为有价值的碳纳米管

摘要 废硬塑料的管理是世界范围内的一大挑战。硬塑料的常规热解和气化已被广泛报道。然而，从硬塑料生产高价值碳纳米管作为主要产品或副产品的报道很少。在这项工作中，我们通过使用酚醛树脂热解生产高价值碳纳米管来研究和报告这项工作，以提高该技术的经济竞争力。通过扫描电子显微镜、透射电子显微镜、X射线衍射、拉曼光谱和程序升温氧化对制备的碳纳米管进行表征。使用镍催化剂的碳纳米管的产率约为 24.07%，纯度为 93.13%。与Ni催化剂相比，Fe催化剂具有更高的CNT产率和纯度，分别达到 34.39% 和 97.45%。通过透射电子显微镜和拉曼表征发现，Fe 催化剂制备的 CNTs 的石墨化质量高于 Ni 催化剂制备的 CNTs。