减压馏分油（VGO）中噻吩类硫化物的沸点分布

将噻吩类硫化物母环已有的沸点数据与经验公式相结合，得到减压馏分油（VGO）中各类硫化物在不同碳数下的沸点数据，经验公式计算得到的沸点数据与已知的沸点数据基本吻合。采用傅里叶变换离子回旋共振质谱(FT ICR MS)测得了大庆、胜利、辽河、塔河4种原油的直馏VGO馏分中噻吩类硫化物的详细碳数和类型分布。结合FT ICR MS质谱数据和各类硫化物的沸点数据，可以得到硫化物的沸点分布。使用气相色谱 硫化学发光检测器(GC SCD)对FT ICR MS所得到的硫化物沸点分布结果进行校正，得到了与实际蒸馏温度相一致的硫化物沸点分布。由于FT ICR MS可以区分不同类型的硫化物，因此进一步给出了这4种VGO中噻吩类、苯并噻吩类、二苯并噻吩类以及苯并萘并噻吩类硫化物的沸点分布，可以为重油脱硫工艺的开发和改进提供依据。

The Boiling Point Distribution of Thiophene Derivatives in Vacuum Gas Oils

The boiling point of the thiophene derivatives of different type and carbon number was calculated by combining the given boiling point of thiophene parent rings and experiential formula. The calculated boiling points of thiophene derivatives were consistent with the given boiling points. Four straight run vacuum gas oils (VGO) were characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT ICR MS), by which the carbon number and compound type distributions of thiophene derivatives in the VGO samples were obtained. The boiling point distributions of the thiophene derivatives were calculated by the FT ICR MS data and the predicted boiling points. The sulfur distribution of the VGO samples was also measured by GC SCD to calibrate the results obtained by FT ICR MS. The boiling point distribution of thiophene, benzothiophene, dibenzothiophene and benzonaphthothiophene was produced by FT ICR MS, which would be helpful for the refining process.