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通过氧化诱导的微观结构重构的多尺度表征在林泉采矿煤矿的煤中氧化
Jian Chen1, Ying Wen2, Baoshan Jia3
1School of Mining, Liaoning Technical University, Fuxin Liaoning, 123000, China. chenjian@lntu.edu.cn.
Scientific reports
|July 2, 2025
概括
来自Lingquan矿的氧化煤显示出增加的中性和功能组,使其比原始煤更容易发生自燃,这是由于其较松散的微晶结构.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 煤炭科学 煤炭科学
背景情况:
- 石灰岩对自燃的易感性是采矿领域的一个重大问题.
- 了解氧化引起的微观结构变化对于预测和预防煤炭火灾至关重要.
研究的目的:
- 为了研究灵泉矿山氧化红煤中的微观结构变化.
- 为了确定低温氧化对煤自燃特性的影响.
主要方法:
- 低温吸附以分析孔隙结构.
- 扫描电子显微镜 (SEM) 用于表面形态.
- 对于微晶结构的X射线衍射 (XRD).
- 函数组的福里埃变换红外光谱 (FTIR). 功能组.
主要成果:
- 氧化后的煤呈现出显著增加的半孔体积和特定表面积.
- 关键功能组 (-CH3和C=O) 显示峰值区域增加,表明反应性增强.
- 微晶结构分析显示,芳香层间距和大小增加,但层数较少,导致结构较松散,结合度较低.
结论:
- 低温氧化显著改变了煤的微观结构,增加了它对自燃的倾向.
- 增强的表面积,功能组的反应性和改变的微晶结构有助于增加风险.
- 这些发现为氧化红煤的自发燃烧行为提供了关键的见解.
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