石油的芳香选择性尺寸排除色谱 (ASSEC) 使用传统的正常相柱:石油特征的可持续解决方案
Abdulaziz S Domiati1, Ahmed M Aldawood1, Munthir M Alshammari1
1Research and Analytical Services Department, Saudi Aramco, Dhahran, Saudi Arabia.
Journal of separation science
|June 26, 2025
概括
芳香选择性大小排除色谱 (ASSEC) 有效地描述了石油中的石油芳香物化模式. 这种先进的液态色谱法补充了现有的碳化合物勘探和炼油技术.
科学领域:
- 石油化学 石油化学 石油化学
- 分析化学是一种分析化学.
- 染色体学 染色体学 是一种染色学.
背景情况:
- 对石油芳香物进行全面的表征对于碳化合物勘探和炼油至关重要.
- 现有的分析方法,如气相色谱和高分辨率质谱,在分析石油中全方位的芳香化合物方面存在局限性.
- 需要一种分析方法,能够在各种沸点分数中表征芳香化合物.
研究的目的:
- 评估不同静态相 (氨基,二醇,,聚乙烯) 在芳香选择性大小排除色谱 (ASSEC) 中的选择性,以基于化模式来表征芳香化合物.
- 使用ASSEC. 确定石油样本中的芳香化合物的化模式.
- 将ASSEC获得的结果与气相色谱-气相色谱 (GC×GC) 的结果进行比较,以验证该方法的适用性.
主要方法:
- 使用二甲作为移动相的芳香选择性大小排除色谱 (ASSEC) 进行了研究.
- 评估了三个极性结合的相 (氨基,二醇,) 和一个聚乙烯-二乙烯相的选择性.
- 分析了标准芳香化合物和石油样本,以确定基碳原子分布 (基化模式).
主要成果:
- 聚乙烯-双乙烯阶段显示分离主要受到吸附色谱的影响,而联阶段分离主要是基于尺寸排除.
- 氨基和二醇结合的二氧化相在ASSEC模式下对基碳原子的数量表现出选择性.
- 石油样品的ASSEC分析显示了与GC×GC获得的化模式一致,表明碳原子数的类似趋势.
结论:
- 评估的极性结合的二氧化相,特别是氨基和二醇相,适用于使用ASSEC确定石油中的芳香化合物的化模式.
- ASSEC提供了一种有价值的分析方法,用于表征各种石油部分中的芳香化合物.
- ASSEC和GC×GC结果之间的强烈相关性证实了ASSEC对石油芳香性特征的可靠性和适用性.
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