结合富里埃变换红外和拉曼光谱来描述二氧化分子结构:了解它们的热成熟度
Dun Wu1,2, Chenglong Wang1, Wenxu Liang3
1Key Laboratory of Intelligent Underground Detection Technology, College of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China.
International journal of molecular sciences
|March 27, 2025
概括
随着油脂的成熟,其芳香性和石墨化增加,而形结构减少. 这项研究使用FTIR和拉曼光谱分析了页岩油,为石油和天然气勘探提供了热演变的见解.
科学领域:
- 地质化学 地质化学
- 有机石矿学 有机石矿学
- 频谱学是一种光谱学.
背景情况:
- 对于了解碳化合物生成,Kerogen的热成熟度至关重要.
- 分析有机功能组和碳结构,可以深入了解素的演变.
- 研究了华南煤田的晚碳期层中的油页岩.
研究的目的:
- 系统地分析素的有机功能组和碳结构变化与热成熟度的变化.
- 要从数量和质量上表征功能组 (基,基,甲基) 和异性/芳香碳比.
- 为了确定热成熟度和石化的分子和结构特征之间的关系.
主要方法:
- 通过酸性处理,除氧化物和重液分离提取素.
- 福利埃变换红外光谱 (FTIR) 用于识别功能组和计算芳香度.
- 激光拉曼光谱测定碳原子的有序性,石墨化和热成熟度指标 (A_D1/A_G比).
主要成果:
- 增加的热成熟度导致了素中更高的芳香结构参数和更低的异质参数.
- FTIR确定了不同的功能组,并提供了芳香度和阿利法/芳香比率.
- 拉曼光谱显示,随着成熟度的增加,碳原子的秩序和石墨化得到了增强,其中A_D1/A_G作为关键指标.
- 计算的变态温度验证了与反射率 (R0) 和H/C比的相关性.
结论:
- 煤化物热成熟度与其有机功能组组成和碳结构之间存在强烈的相关性.
- 增加热成熟度会导致更高的芳香化,更短的阿利法链和更好的石墨化.
- 这些发现有助于人们更好地了解石化的热演变,并为石油和天然气勘探提供了洞察力.
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