Speciation Distribution of Polycyclic Aromatic Sulfur Heterocycles in Crude Oil

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• 作者：Xiaolan Zeng ; Jun Lin ; Jianhua Liu ; Yongtan Yang
• 关键词：Polycyclic aromatic sulfur heterocycles ; Speciation analysis ; Crude oil ; Gas chromatography
• 刊名：Chinese Journal of Analytical Chemistry
• 出版年：2006
• 出版时间：November 2006
• 年：2006
• 卷：34
• 期：11
• 页码：1546-1551
• 全文大小：221 K

文摘

A method for speciation analysis of polycyclic aromatic sulfur heterocycles (PASHs) in crude oil was established. The PASHs were separated from the oil sample by ligand exchange chromatography using SiO₂ with PdCl₂. The sulfur compounds were then determined by gas chromatography using a mass spectrogram detector (GC/MS), gas chromatography with a sulfur chemiluminescence detector (GC-SCD), and chromatography retention index of the compounds. More than 100 PASHs (including alkyl benzothiophene, dibenzothiophene, and alkyl dibenzothiophene) were identified. The dibenzothiophene and alkyl dibenzothiophene represent about 91 % of the total PASHs in crude oil. The method can be applied for speciation analysis of PASHs in crude oils from different sources.