LCO选择性加氢-催化裂化组合生产轻质芳烃（LTA）技术工业实践

在中国石化扬子石油化工有限公司705 kt/a柴油加氢装置和700 kt/a催化裂化装置进行了LCO选择性加氢-催化裂化组合生产轻质芳烃（LTA）技术的工业试验。结果表明：采用LTA技术，当原料加氢LCO密度（20℃）为0.9210 g/cm³、氢质量分数为10.92%、多环芳烃质量分数为18.7%时，加氢LCO催化裂化单程转化率为70.90%，全循环操作时，汽油收率达到64.53%，C₆~C₈芳烃收率达到23.91%，C₆~C₁₀烷基苯型单环芳烃收率达到35.53%。此外，采用LTA技术时，加氢LCO作催化裂化进料能够实现反应再生自身热平衡操作，分馏和吸收稳定系统操作稳定。

INDUSTRIAL PRACTICE OF LTA TECHNOLOGY FOR CONVERTING LCO TO LIGHT AROMATICS

The industrial trial of LTA technology for converting LCO to light aromatics was carried out in a LCO hydrotreating unit with capacity of 705 kt/a and a catalytic cracking unit with capacity of 700 kt/a in SINOPEC Yangzi Petrochemical Company, Ltd. The results showed that using the hydrotreated LCO with density of 921.0 kg/m³, hydrogen content of 10.92% and polycyclic aromatics content of 18.7% as FCC feed, the once-through conversion was 70.90%, the yields of gasoline, C₆-C₈ aromatics and C₆-C₁₀ monocyclic aromatics were up to 64.53%, 23.91% and 35.53%, respectively in full recycle operation. In addition, the industrial results of LTA technology also proved that the hydrotreated LCO feed can meet the heat-balance operation of reaction and regeneration system, and meanwhile the operation of the fractionator and absorbing-stabilizing system can be stable.