催化裂化轻循环油生产高辛烷值汽油技术LTAG的工业应用

福建联合石油化工有限公司在蜡油加氢处理和催化裂化装置上采用LTAG技术,以催化裂化轻循环油(LCO)和蜡油生产高辛烷值汽油。对LCO和蜡油混合加氢后得到的加氢LCO和加氢蜡油分别在催化裂化提升管反应器下部不同位置分层顺序进料方式(LTAG技术)与在催化裂化反应器下部混合进料方式的生产数据进行了系统的分析和总结。结果表明:与混合加氢油进料的常规方式进行对比,LTAG技术的LCO催化裂化表观转化率提高5.17百分点,表观裂化率提高7.87百分点,表观缩合率降低2.01百分点,稳定汽油中烯烃和芳烃的体积分数分别增加1.2百分点和2.0百分点,汽油辛烷值RON和MON分别提高1.4个单位和0.8个单位。LTAG技术是将LCO高效转化为高辛烷值汽油的重要手段。

APPLICATION OF LTAG TECHNOLOGY FOR CONVERTING LCO TO HIGH OCTANE NUMBER GASOLINE

The LTAG technology was adopted in the VGO hydrotreating and catalytic cracking units of Fujian Refining and Petrochemical Company to produce high octane gasoline using LCO and VGO.LCO and VGO were mixed and hydrotreated firstly.After separation,hydrotreated LCO and hydrotreated VGO were fed at different positions in the lower part of the riser reactor,respectively.The results showed that compared with the conventional method of feeding mixed hydrotreated LCO and VGO,the catalytic cracking apparent conversion rate of hydrotreated LCO was increased by 5.17 percentage points,apparent cracking rate was increased by 7.87 percentage points,and the apparent condensation rate was decreased by 2.01 percentage points;the contents of olefins and aromatics in gasoline were increased by 1.2 percentage points and 2.0 percentage points,respectively;the gasoline octane number,RON and MON,were increased by 1.4 units and 0.8 units,respectively,showing that LTAG technology is effective method to convert LCO into high octane number gasoline.