蒸餘油中的多環芳香烴化合物組成常在加氫處理的過程中，造成催化劑的失活，因此油樣中芳香烴化合物的定量分析是煉油製程中非常重要的工作。文獻上已有用來計算汽油或柴油芳香環的參數，但這些方法並不一定適用於常壓蒸餾蒸餘油。本研究的主要目的是發展便捷的方法以估算油樣中芳香烴化合物的含量。
　　本研究主要是由氣相層析及氣相層析質譜分析鑑定油品中芳香烴化合物的組成，並藉此計算各系列化合物之相對含量。由芳香烴化合物的組成分析統計所計算的結果顯示：芳香環上的取代基鏈長平均約為2，結合此值與氫核磁共振光譜之結果可計算出油品中飽和烴、芳香烴及環烷烴化合物之含量，此一計算結果與利用管柱層析分析的結果比較，其差異約在6%以內；而由碳核磁共振光譜的定量分析的結果顯示110～140 ppm (Ar-C)與0～50 ppm (Ali-C)的積分比值（Ar-C/Ali-C）可直接用來估算原油或蒸餘油中芳香烴的百分組成。

　　The polycyclic aromatic hydrocarbons (PAHs) in the atmospheric distillation residue is one of the major components involved in the catalyst deactivation during the hydrotreatment processes. Although several methods in measuring the aromatic contents of gasoline or diesel oil have been reported, there is no 　appropriate method for measuring the aromatic content of the atmospheric distillation residue. In the current studies, efforts have been focus on solving the problem addressed above.
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