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基于TGA-DSC的煤的热解和氧化特征研究

Yongfei Jin^1,2,3, Dailin Li¹, Yin Liu^1,2,3

¹College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

|April 1, 2024

概括

这项研究使用热重力测量分析研究了煤的自发燃烧. 结果显示了明显的热解和燃烧特性,为早期预警系统提供了基础.

科学领域:

* 环境科学环境科学
* 材料科学材料科学
* 化学工程化学工程

背景情况:

* 煤 (CG) 自发燃烧带来了重大的环境和生态风险.
*了解CG的反应动力学和外热特性对于防止火灾至关重要.
*现有研究需要进一步阐明CG的氧化自燃机制.

研究的目的:

* 为了研究反应动力学参数和煤的外热特性.
*从热力学角度分析CG的热解和氧化燃烧过程.
*为CG自燃早期预警系统建立理论基础.

主要方法:

*采用热重力测量 (TG) 分析来研究热解和氧化性燃烧.
*使用差分扫描热度计 (DSC) 来评估外热效应.
* 与CG的TG/DTG/DSC曲线与不同条件下的原始煤进行比较.

主要成果:

*CG的TG/DTG/DSC曲线显示了不同气体大气层和阶段的显著变化.
* CG和原始煤在热解和燃烧方面表现出相似的趋势,在峰值幅度上有所不同.
*加热速度的增加使CG的TG/DTG/DSC曲线转移到更高的温度,导致特有的温度歇斯底里.

结论:

*这项研究提供了关于煤炭燃烧的热力学和动力学方面的详细见解.
* 结果突出了气体大气和加热速度对CG热行为的影响.
*这项研究为开发先进的自燃燃烧早期预警系统提供了理论基础.

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