Modified Friedman isoconversional kinetic method for effective activation energies of waste tires rubber pyrolysis

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-13 DOI:10.1007/s11144-024-02629-7

Zhen Zhang, Xiaoguang Zheng, Junmeng Cai

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Abstract

A modified Friedman isoconversional method based on the weight-loss data was proposed to determine the kinetics models and parameters. Thermal pyrolysis kinetic characteristics of waste tire rubber (WTR) samples under nitrogen conditions was investigated by measuring the rate of mass loss as a function of time and temperature. The obtained thermal pyrolysis data was applied to analyze the kinetic parameters using the Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS) and modified Friedman isoconversional methods. The results showed that the modified Friedman isoconversional method was used to provide the most precise values of activation energy for WTR pyrolysis, which ranged from 130.5 to 177.6 kJ/mol with the conversion range of 0.1–0.9. It can avoid systematic errors in the FWO and KAS methods. These data were in good agreement with the values reported in the related previous studies. Therefore, the modified Friedman method provides an accurate and effective way to explain the pyrolysis parameters and equations of kinetics in WTR.

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改良弗里德曼等转化动力学法计算废轮胎橡胶热解的有效活化能

提出了一种基于失重数据的改良弗里德曼等转化法来确定动力学模型和参数。通过测量质量损失率与时间和温度的函数关系，研究了氮气条件下废轮胎橡胶（WTR）样品的热热解动力学特性。利用获得的热热解数据，采用 Flynn-Wall-Ozawa (FWO)、Kissinger-Akahira-Sunose (KAS) 和修正的 Friedman 等转换法分析了动力学参数。结果表明，改良弗里德曼等转换法为 WTR 热解提供了最精确的活化能值，其范围为 130.5 至 177.6 kJ/mol，转换范围为 0.1-0.9。它可以避免 FWO 和 KAS 方法中的系统误差。这些数据与之前相关研究中报告的数值十分吻合。因此，改进的弗里德曼法为解释 WTR 的热解参数和动力学方程提供了一种准确而有效的方法。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.