基于微FTIR的高煤分子结构异质性的研究
Jun Zhao1, Qingmin Shi1, Shuangming Wang1
1Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an 710054 China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|January 17, 2025
概括
调查维特里尼特的研究
科学领域:
- 地质化学 地质化学
- 有机石油学 有机石油学
- 煤炭科学 煤炭科学
背景情况:
- 煤炭的微区域分子结构会影响热导和热解过程中的挥发性生成.
- 维特里尼特,一个关键的碳化合物源,在微区域中表现出分子结构异质性,这是一个鲜为人知的方面.
研究的目的:
- 用微福里埃变换红外光谱 (Micro-FTIR) 来描述富含焦炭不同微区域中的分子结构异质性.
- 为了研究分子结构异质性和煤炭热解中的焦油产量之间的关系.
主要方法:
- 利用微型FTIR光谱仪进行微米级地表分子结构分析,分析富含焦油煤.
- 在特定波数波段 (1100-1800厘米-1,2800-3000厘米-1和700-900厘米-1) 中分析了功能组分布.
主要成果:
- 显著的分子结构异质性被观察到,即使在微观同质的玻璃石区域内.
- 在1100-1800厘米-1带 (芳香,以太,基结构) 中,异质性更明显,而不是在阿利法 (2800-3000厘米-1) 和芳香外平面曲 (700-900厘米-1) 带中.
- 具有较高焦油产量的煤炭样本显示分子结构异质性减少.
结论:
- 芳香,以太和基结构是维特里尼特微区域分子异质性的主要贡献者.
- 较高的焦油产量与富含焦油煤中的分子结构异质性降低相关.
- 这些发现为富含焦油煤的热解行为提供了理论见解.
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