Combustion characteristics and thermokinetics of coconut shell, coal water slurry, and biomass

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-05-01 DOI:10.1007/s11144-024-02633-x

Yikun Peng, Xianyou Tang, Zhukai Zeng, Canjun Xu, Wangsong Wu

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Abstract

The combustion characteristics of coconut shell, coal water slurry, and biomass were studied by combustion thermogravimetry at different heating rates. The DTG curves of all samples exhibit three distinct peaks. The comprehensive combustion characteristic index (S_N) of coconut shell and biomass was higher, and the ignition point and burnout temperature were lower. At the same heating rate, the S_N of coal water slurry is the highest, the S_N of coconut shell, coal water slurry and biomass increased by 337%, 259%, and 429%. Based on the distributed Coats–Redfern integral method, the combustion kinetics of the samples was analyzed. The activation energy of low temperature combustion zone is higher than that in high temperature combustion zone. As the heating rate increases, the activation energy of the samples decreases slightly, but the overall trend remains similar. When n = 2, the fitting curve has a good linear relationship, and the correlation coefficient R² is all above 0.99.

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椰壳、水煤浆和生物质的燃烧特性和热动力学

通过燃烧热重仪对椰壳、水煤浆和生物质在不同加热速率下的燃烧特性进行了研究。所有样品的 DTG 曲线都呈现出三个明显的峰值。椰壳和生物质的综合燃烧特性指数（SN）较高，燃点和燃尽温度较低。在相同的加热速率下，水煤浆的 SN 最高，椰壳、水煤浆和生物质的 SN 分别增加了 337%、259% 和 429%。基于分布式 Coats-Redfern 积分法，分析了样品的燃烧动力学。低温燃烧区的活化能高于高温燃烧区。随着加热速率的增加，样品的活化能略有下降，但总体趋势相似。当 n = 2 时，拟合曲线具有良好的线性关系，相关系数 R2 均在 0.99 以上。

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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.