催化裂化柴油加氢生产高密度喷气燃料过程研究

利用催化裂化柴油（LCO）密度较高且富含芳烃的性质特点，开展了以LCO为原料生产高密度喷气燃料的工艺研究。结果表明，以LCO为原料，采用高芳烃饱和活性的NiMoW/Al₂O₃加氢精制催化剂，在适当的工艺条件下进行超深度加氢饱和，可使LCO中芳烃质量分数降低至5%以下。进一步通过气相色谱-质谱（GC-MS）方法进行详细的烃类分析，可明确各烃类的分布规律并考察富集单环、二环及三环环烷烃的馏分，确定全馏分LCO加氢生产高密度喷气燃料时理想的终馏点为270～280 ℃，在此分馏温度下可得到冰点低于－47 ℃、密度（20 ℃）大于0.835 g/cm³ 的高密度喷气燃料组分。

STUDY ON THE PROCESS OF HIGH DENSITY JET FUEL PRODUCTION FROM FCC LCO

Based on the characteristics of high density and rich aromatics of FCC light cycle oil（LCO），the process technology of producing high-density jet fuel from the whole fraction of LCO was studied. The results show that the mass fraction of aromatics can be reduced to less than 5% by using NiMoW/Al₂O₃ hydrofining catalyst with high aromatics saturation activity through ultra-deep hydrogenation saturation under proper process conditions. Further detailed hydrocarbon analysis by gas chromatography-mass spectrometry (GC-MS) can clarify the distribution of hydrocarbons and investigate the fractions enriched with monocyclic，bicyclic and tricyclic cycloalkanes. The final boiling point of ideal fraction was 270 - 280 ℃ when the full fraction LCO was hydrogenated to produce high density jet fuel. Freezing point of high-density jet fuel component is lower than －47 ℃ and density（20 ℃）is greater than 0.835 g/cm³.