关键词: 石油, 常压渣油, 含硫化合物, 甲基衍生化, 傅里叶变换离子回旋共振质谱, 化学分析, 燃料

Abstract: The macroscopic properties of heavy oil had been extensively studied. There are very few studies on characterizing of molecular level information. To having better understanding of the composition of heavy oil,and providing more detailed and effective information for further processing,the sulfur-containing compounds from Saudi Arabia atmospheric residue were converted to methyl sulfide salt with polarity using methyl derivatization method. Positive-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometer(ESI FT-ICR MS)was employed to analyze the heteroatomic compounds. The results showed that the relative abundance of heteroatom compounds from high to low was:S₁,N₁,S₂,O₁S₁,N₁S₁,N₁O₁,N₁S₂,and N₁O₂. S₁ class species contained a sulfur atom that had the highest relative abundance. Among them,the relative abundance of benzothiophene homologues series(DBE=6) was the highest,followed by dibenzothiophene homologues series(DBE=9). Compared with S₁ class species,the DBE and carbon number distribution of S₂ were less. Meanwhile,S₂ class species with 9 DBE had higher relative abundance.

Key words: petroleum, atmospheric residue, sulfur-containing compounds, methyl derivatization, Fourier transform ion cyclotron resonance mass spectrometer(FT-ICR MS), chemical analysis, fuel