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Study on the pyrolysis behaviors of mixed waste plastics

机译：混合废塑料的热解作用研究

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摘要

Pyrolysis is considered as a promising technology to recover valuable hydrocarbons from waste streams. Even though some studies exist on waste plastics pyrolysis, it still lacks of in-depth knowledge on multiple components plastics pyrolysis. This study explores three types of waste plastics and their mixed forms to obtain thermal cracking features, products distribution, and kinetic features. TG-FTIR was used to observe the decomposition characteristics and functional groups in the volatile fractions of products. The interaction effects of the plastics components during the co-pyrolysis process were compared, analyzed, and reported. For a more precise knowledge of the reaction procedure, a thermodynamic study was conducted. Results showed that TG and DTG curves of PS and PE were similar to each other but different from those of PVC. The main products of PE and PS pyrolysis were alkanes and alkenes, while the major products of PVC pyrolysis were HCl, alkenes, and a small number of aromatic compounds. During the co-pyrolysis process of PS with PVC and PE with PVC, the thermal decomposition rates of PVC were accelerated due to synergistic effect. Implied by the kinetic parameters, pyrolysis of PS, PE, and PVC exhibited one-order reaction from pure component to multiple component mixtures. (c) 2021 Published by Elsevier Ltd.
机译：热解被认为是从废物流中恢复有价值的碳氢化合物的有希望的技术。尽管存在一些研究废塑料热解，但它仍然缺乏对多种组分塑料热解的深入知识。本研究探讨了三种类型的废塑料及其混合形式，以获得热裂解特征，产品分布和动力学特征。 TG-FTIR用于观察产物挥发性级分中的分解特征和官能团。比较，分析并报道塑料组分在共热分解过程中的相互作用效应。为了更精确地了解反应程序，进行了热力学研究。结果表明，PS和PE的TG和DTG曲线彼此相似，但与PVC的不同。 PE和Ps热解的主要产物是烷烃和烯烃，而PVC热解的主要产物是HCl，烯烃和少量芳族化合物。在PS用PVC和PE具有PVC的PS的共热分解过程中，由于协同效应，PVC的热分解率加速。由动力学参数暗示，PS，PE和PVC的热解，从纯成分到多个组分混合物表现出一定的反应。 （c）2021由elestvier有限公司出版

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  • 来源
    《Renewable energy》 |2021年第8期|662-674|共13页
  • 作者

    Li Dan; Lei Shijun; Wang Ping; Zhong Lei; Ma Wenchao; Chen Guanyi;

  • 作者单位

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Biomass Waste Utilizat Minist Edu Key Lab Efficient Utilizat Low & Medium Grade Ene Tianjin 300350 Peoples R China|Tibet Univ Sch Sci Lhasa 850000 Tibet Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pyrolysis; Waste plastics; TG-FTIR; Kinetics;

    机译：热解;废塑料;TG-FTIR;动力学;

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