Abstract The utilization of polymer wastes for volatile fuel production has been considered as a sustainable and environmental-friendly approach for achieving better waste management, pollution protection, and renewable energy security. Polymer pyrolysis, as an ideal method for polymer waste converted into storable fuel, was explored thoroughly in this study from pyrolysis kinetics to evolved gas analysis. Two typical building-used polymer wastes, extruded polystyrene (XPS) and rigid polyurethane (RPU), were selected to conduct a series of thermogravimetry (TG) experiments. Then commonly-used isoconversional methods were employed to calculate the kinetic parameters of the pyrolysis during the whole conversion. Kinetic models of XPS and RPU thermal degradations were identified from nineteen reaction models by Coats-Redfern and masterplots methods. Then accommodation function was employed to adjust the theoretical model for reconstruction. Considering the complexities of RPU component and degradation process, Py-GC/MS was used to identify the volatile product component at 250, 340, and 460 °C, respectively. Results showed that there are large parts of volatile alcohols and ethers escaped during RPU pyrolysis process. The results of this study have implications concerning kinetic triplet determination method and escaped gas analysis during polymer waste pyrolysis process.

中文翻译：

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多动力学方法和 Py-GC/MS 对废挤出聚苯乙烯和硬质聚氨酯的热解行为

摘要 利用聚合物废物生产挥发性燃料已被认为是一种可持续和环境友好的方法，可实现更好的废物管理、污染保护和可再生能源安全。本研究从热解动力学到逸出气体分析，深入探索了聚合物热解作为将聚合物废物转化为可储存燃料的理想方法。选择两种典型的建筑用聚合物废料，挤出聚苯乙烯（XPS）和硬质聚氨酯（RPU），进行一系列热重（TG）实验。然后采用常用的等转化方法计算整个转化过程中热解的动力学参数。XPS 和 RPU 热降解的动力学模型是通过 Coats-Redfern 和 masterplots 方法从 19 个反应模型中确定的。然后利用调节函数调整理论模型进行重建。考虑到 RPU 组分和降解过程的复杂性，分别使用 Py-GC/MS 来鉴定 250、340 和 460 °C 下的挥发性产物组分。结果表明，RPU热解过程中有大量挥发性醇和醚逸出。这项研究的结果对聚合物废物热解过程中的动力学三重测定方法和逸出气体分析具有影响。结果表明，RPU热解过程中有大量挥发性醇和醚逸出。这项研究的结果对聚合物废物热解过程中的动力学三重测定方法和逸出气体分析具有影响。结果表明，RPU热解过程中有大量挥发性醇和醚逸出。这项研究的结果对聚合物废物热解过程中的动力学三重测定方法和逸出气体分析具有影响。