School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT7 1NN, United Kingdom.
School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Waste Manag. 2023 Jul 1;166:141-151. doi: 10.1016/j.wasman.2023.05.002. Epub 2023 May 10.
The investigation of the pyrolysis behaviour of real-world waste plastics (RWWP) and using them as the feedstock to produce carbon nanotubes (CNTs) could serve as an effective solution to address the global waste plastics catastrophe. This research aimed to characterize the pyrolysis behaviour of RWWP via thermogravimetric analysis (TG) and fast pyrolysis-TG/mass spectrometry (Py-TG/MS) analyses. Activation energies (131.04 kJ mol -171.04 kJ mol) for RWWP pyrolysis were calculated by three methods: Flynn-Wall-Ozawa (FWO) method, Kissinger-Akahira-Sunose (KAS) method, and Starink method. Py-TG/MS results indicated that the RWWP could be identified as polystyrene (RWWP-1), polyethylene (RWWP-2), polyethylene terephthalate (RWWP-3, 4), and polypropylene (RWWP-5, 6). In addition, RWWP-1, 2, 5, 6 outperform RWWP-3 and 4 as sources of carbon for producing CNTs. The results showed a high carbon yield of 32.21 wt% and a high degree of CNT purity at 93.04%.
研究真实世界废塑料（RWWP）的热解行为，并将其用作生产碳纳米管（CNTs）的原料，可以有效解决全球废塑料危机。本研究旨在通过热重分析（TG）和快速热解-TG/质谱联用（Py-TG/MS）分析来表征 RWWP 的热解行为。通过三种方法（Flynn-Wall-Ozawa 法、Kissinger-Akahira-Sunose 法和 Starink 法）计算 RWWP 热解的活化能（131.04 kJ/mol-71.04 kJ/mol）。Py-TG/MS 结果表明，RWWP 可鉴定为聚苯乙烯（RWWP-1）、聚乙烯（RWWP-2）、聚对苯二甲酸乙二醇酯（RWWP-3、4）和聚丙烯（RWWP-5、6）。此外，RWWP-1、2、5、6 比 RWWP-3 和 4 更适合作为生产 CNTs 的碳源。结果表明，碳收率高达 32.21wt%，CNTs 纯度高达 93.04%。
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