混合塑料热裂解反应动力学研究

石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (4): 114-122.

混合塑料热裂解反应动力学研究

姚璐¹,朱建华¹,李术元²,马跃²,岳长涛²,许强¹,刘宗鹏¹

1. 中国石油大学（北京）化学工程与环境学院
2. 中国石油大学（北京）理学院

收稿日期:2024-08-07 修回日期:2024-12-12 出版日期:2025-04-12 发布日期:2025-04-02
通讯作者: 朱建华 E-mail:rdcas@cup.edu.cn
基金资助:
国家重点研发项目

STUDY ON THE KINETICS OF PYROLYSIS REACTION OF MIXED PLASTICS

Received:2024-08-07 Revised:2024-12-12 Online:2025-04-12 Published:2025-04-02

摘要/Abstract

摘要： 选用聚丙烯(PP)、高密度聚乙烯(HDPE)及聚苯乙烯(PS)3种塑料颗粒，以不同的比例进行混合，利用热重试验装置分析3种塑料样品单独及混合热裂解的温度范围及失重规律，并采用Friedman、KAS和有限平行反应模型求解塑料的热裂解动力学参数。研究结果表明，几种塑料样品发生热裂解反应由易到难的顺序及由Friedman、KAS法计算的平均表观活化能由小到大的顺序均遵循：PS＜PP-PS＜PP-HDPE-PS(1:1:1)＜HDPE-PS＜PP-HDPE-PS(实际比例)＜PP＜PP-HDPE＜HDPE。由有限平行反应模型估算的PP，HDPE，PS，PP-HDPE，PP-PS，HDPE-PS，PP-HDPE-PS(1:1:1)，PP-HDPE-PS(实际比例)塑料样品的热裂解反应活化能分别集中在198~314，231~317，192~297，200~314，194~299，186~301，171~242，196~312 kJ/mol范围内。

关键词: 热裂解反应, 动力学分析, 有限平行反应模型, Friedman法, KAS法

Abstract: Three types of plastic particles, polypropylene (PP), high-density polyethylene (HDPE), and polystyrene (PS), were selected and mixed in different proportions, and the thermogravimetric apparatus was used to analyze the pyrolysis temperature range and weight loss of the separate and mixed samples of the three types of plastics. Friedman, KAS and finite parallel reaction model were used to solve the pyrolysis reaction kinetic parameters of plastics. The results demonstrated that the order of pyrolysis reactions of several plastic samples from easy to difficult and the order of average activation energy calculated by Friedman and KAS method from small to large of several plastic samples followed: PS＜PP-PS＜PP-HDPE-PS(1:1:1)＜HDPE-PS＜PP-HDPE-PS(actual proportions)＜PP＜PP-HDPE＜HDPE. The activation energies of PP, HDPE, PS, PP-HDPE, PP-PS, HDPE-PS, PP-HDPE-PS(1:1:1) and PP-HDPE-PS (actual proportions) plastic samples estimated by the finite parallel reaction model were concentrated in the range of 198–314, 231–317, 192–297, 200–314, 194–299, 186–301, 171–242 and 196–312 kJ/mol, respectively.

Key words: pyrolysis reaction, kinetic analysis, finite parallel reaction model, Friedman method, KAS method

姚璐朱建华李术元马跃岳长涛许强刘宗鹏. 混合塑料热裂解反应动力学研究[J]. 石油炼制与化工, 2025, 56(4): 114-122.

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