Mechanistic study on the co-pyrolysis of cellulose and LDPE: Activation energy variations and functional group evolution

文献类型： 外文期刊

第一作者： Xie, Teng

作者： Xie, Teng;Yao, Zonglu;Huo, Lili;Jia, Jixiu;Zhang, Peizhen;Zhang, Xinyi;Zhao, Yanan;Zhao, Lixin

作者机构：

关键词： Co-pyrolysis; Cellulose; Low-density-polyethylene; Functional group; Mechanism

期刊名称：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0165-2370

年卷期： 2025 年 191 卷

页码：

收录情况： SCI

摘要： The pyrolysis experiments of cellulose (CE), low-density polyethylene (LDPE), and their mixture at a mass ratio of 7:3 were carried out using a thermogravimetric analyzer (TGA). The Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) models were employed to comprehensively analyze the activation energy variations in the reaction system. TG-IR was used to investigate the changes in the functional groups of pyrolysis volatiles, while in-situ infrared spectroscopy was utilized to elucidate the evolution mechanism of functional groups in the solid matrix. The results demonstrated that the co-pyrolysis of CE and LDPE occurs in two distinct stages: predominant cellulose pyrolysis (200-400 degrees C) and the co-pyrolysis of cellulose char and LDPE (400-500 degrees C). In the low-temperature stage (similar to 350 degrees C), intermediates generated from LDPE pyrolysis facilitated the release of volatiles from CE, resulting in an increase of approximately 10.61 % in the maximum weight loss rate compared to the pyrolysis of CE alone. Additionally, these intermediates also promoted the removal of functional groups from the char formed during CE pyrolysis.

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