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对基因不同碳源材料的热动学研究

Rakesh Saini^1,2, Santosh Deb Barma¹, Danda Srinivas Rao¹

¹Department of Mineral Processing, CSIR-IMMT, Bhubaneswar, Odisha 751013, India.

|October 23, 2023

概括

这项研究使用热重力度分析 (TGA) 分析了煤炭,生物质,煤和煤的脱氧化动力学. 佩特科克表现出最高的激活能量,而煤表现出最低的激活能量,这取决于灰的组成和材料结构.

科学领域:

* 化学工程化学工程
* 材料科学材料科学
* * 能源科学能源科学

背景情况:

*了解各种碳化材料的脱氧化动力学对于优化热解过程至关重要.
* 煤炭,生物质,煤和煤等不同原料具有独特的物理化学特性,影响它们的热分解行为.
*以前的研究往往集中在单一的原料类型上,因此需要对不同来源进行比较分析.

研究的目的:

* 用非异热热重力测量分析 (TGA) 确定煤炭,生物质,煤和煤炭的脱氧化动力参数.
* 调查灰成分,形态和结构对这些多样化的材料热运动行为的影响.
* 应用Coats-Redfern动力学模型来量化脱氧化过程的激活能量.

主要方法:

*非异热热重力测量分析 (TGA) 在惰性大气中以每分钟10,15和20°C的加热速度从25-1000°C进行.
*用于物理和化学表征的近似和最终分析.
*X射线光 (XRF) 用于灰成分分析.
*扫描电子显微镜 (SEM) 和富里埃变换红外光谱 (FTIR) 用于形态和结构分析.

主要成果:

* 在测试的加热速率中,Petcoke样品显示了最高的激活能量 (Ea),范围为57.17至67.58kJ/mol.
* 岩样本表现出最低的激活能 (Ea),在12.84到16.03kJ/mol之间.
*观察到热运动行为与灰成分,材料形态和结构的催化作用之间的相关性.

结论:

* 煤炭,生物质,煤和煤炭焦炭之间脱氧化动力学有很大差异,煤炭焦炭最热稳定,煤最不稳定.
*灰的组成和碳源材料的固有物理结构在它们的热解行为中起着重要作用.
* 这一全面的生理化学分析为优化不同碳酸性原料的缓慢热解过程提供了宝贵的见解.

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