在煤油共生中研究微观结构进化和氧化动力学
Lintao Hu1, Hongqing Zhu1, Rui Li1
1School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
The Science of the total environment
|August 20, 2024
概括
将油添加到煤炭中 (煤油共生或COS) 会减弱氧气吸收,但会增加活性组,促进自燃. 这项研究提供了对COS的洞察力.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 煤油共生 (COS) 的自发燃烧对矿山安全和环境构成风险.
- 了解COS特性对于有效的安全管理至关重要.
研究的目的:
- 研究不同油含量的COS的宏观和微观结构特征.
- 分析油质百分比对COS自燃机制的影响.
主要方法:
- 同时进行热分析.
- 低温的N2吸附方式
- 扫描电子显微镜 (SEM) 的使用
- 在现场的里埃变换红外光谱 (FTIR)
主要成果:
- 增加的油含量削弱了氧气吸收,提高了特征温度,降低了点火温度.
- 显而易见的激活能量显著下降,特别是在25%的油含量下 (89%的热解减少,60.65%的燃烧).
- 更高的油含量导致更多的基和基碳化合物组,增加自燃促进.
结论:
- 在COS孔上的油覆盖限制了氧气吸附,而增加的活性组促进了燃烧.
- 这些发现为了解COS氧化动力学和共同采矿地区的灾害预防提供了理论支持.
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