第二代LTAG技术的工业应用

为进一步提高汽油辛烷值并降低氢耗，中国石化上海石油化工股份有限公司在3.50 Mt/a催化裂化装置和3.90 Mt/a渣油加氢装置上实施了第二代催化裂化柴油（LCO）加氢-催化裂化组合多产高辛烷值汽油和芳烃料（LTAG Ⅱ）技术。标定结果表明：采用减压蒸馏塔对LCO进行轻、重馏分切割，重馏分加氢后与轻馏分一起去催化裂化回炼，最终催化裂化反应的表观转化率为74.12%，（汽油＋液化气）表观选择性之和约为88.00%；与不采用LTAG技术时相比，催化裂化装置LCO产率降低5.50百分点，液化气与汽油产率分别提高1.47百分点和3.37百分点；与采用LCO全馏分加氢回炼的第一代LTAG技术时相比，催化裂化所得稳定汽油的RON、MON分别提高0.6、0.7，且LCO加氢的氢耗（w）降低22.70%，经济效益显著。

INDUSTRIAL APPLICATION OF SECOND-GENERATION LTAG TECHNOLOGY

To further improve the octane number of gasoline and reduce hydrogen consumption, the second generation LTAG (LTAG-Ⅱ) technology was implemented on 3.50 Mt/a FCCU and 3.90 Mt/a RDS unit in SINOPEC Shanghai Petrochemical Company Limited. The calibration results of industrial application shows that the apparent conversion of light fraction from vacuum tower cutting LCO into light and heavy fractions and heavy fraction after hydrocracking is 74.12%. The gasoline and LPG selectivity reached about 88%. Compared with blank calibration, the yields of gasoline and LPG increased by 1.47 percentage points and 3.37 percentage points, respectively with 5.50 percentage points reduction of LCO yield in FCCU. Compared with the first generation LTAG technology of LCO full fraction hydrotreating, RON and MON of the stable gasoline increased by 0.6 and 0.7 units respectively. Hydrogen consumption rate of LCO hydrogenation reduced by 22.70%. LTAG-Ⅱ has significant economic benefits.