催化裂化柴油加氢生产高密度喷气燃料过程研究

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

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/Al_(2)O_(3)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 cm^(3)的高密度喷气燃料组分。

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/Al_(2)O_(3) 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 cm^(3).