蜡油加氢裂化工艺中金刚烷指纹化合物的分析及应用

选择单金刚烷及双金刚烷化合物作为烃指纹化合物，采用气相色谱/质谱（GC/MS）对其进行定性及定量分析，考察了不同加氢裂化条件下，金刚烷化合物的含量及其分布特点。结果表明，减压蜡油（VGO）经加氢裂化后，165℃～350℃中间馏分产品中存在丰富的金刚烷化合物；随着转化率的增加，双金刚烷化合物含量均不断增加，而部分单金刚烷化合物在高转化率条件下含量减少。在加氢裂化过程中，金刚烷化合物含量变化与烃类组成的变化密切相关，并且金刚烷化合物指纹参数与加氢裂化反应转化率呈现良好的线性关系，可监测加氢裂化反应深度及烃类变化。

Analysis and Application of Diamondoid Fingerprints in Hydrocracking of Vacuum Gas Oils

Diamondoid, the rigid, three-dimensionally fused cyclohexyl-ring alkane compoundsare widely found in crude oils and refined products, which are much more stable than other hydrocarbons in the hydrocracking process, so they were chosen as fingerprinting compounds used in hydrocracking process．Their distributions were examined by GC/MS in the various midrange products with different conversion rates． It was found that the mass fraction of adamatanesdecreased gradually under the high conversion rate, whichwas closely related toother hydrocarbons in the process. The indices of diamantanes had a good linear relation with the conversion rate of hydrocracking process, implying that the diamonoid compounds were of certain indicating significance for the change of other hydrocarbons to some extent．