操作条件对流化催化裂化汽油重馏分催化精馏加氢脱硫的影响

利用 CoMoP/Al_2O_3-TiO_2汽油加氢脱硫工业催化剂,在新型垂直筛板塔催化精馏装置上对流化催化裂化(FCC)汽油重馏分进行加氢脱硫,考察了进料口位置、压力、氢气与原料油的体积比、原料油的液态空速和回流比对催化精馏加氢脱硫效果的影响。实验结果表明,在进料口位置为第7塔节、压力2.0 MFa、反应段平均温度279℃、氢气与原料油的体积比300、液态空速2.0 h~(-1)、回流比2.0的条件下,FCC 汽油重馏分脱硫率达到95.73%,硫含量由850 42μg/g 降至36.32μg/g,辛烷值损失仅为0.6。将催化精馏加氢脱硫与固定床加氢脱硫进行了对比,结果表明,在相似的操作条件下,催化精馏加氢脱硫的脱硫率略低于固定床加氢脱硫,但油品的辛烷值损失较小。

Hydrodesulfurization of Fluid Catalytic Cracking Gasoline Heavy Distillate by Catalytic Distillation

Hydrodesulfurization of fluid catalytic cracking (FCC) gasoline heavy distillate by catalytic distillation with new-style vertical sieve plate tower had been studied using industrial gasoline hydrodesulfurization catalyst CoMoP/Al_2O_3-TiO_2.Effects of feeding location,pressure,volume ratio of H_2 to oil,LHSV and reflux ratio on hydrodesulfurization were investigated.Under optimal operation conditions:feeding location 7 th column tray,pressure 2.0 MPa,average reaction temperature 279℃, volume ratio of H_2 to oil 300,LHSV 2.0 h~(-1) and reflux ratio 2.0,desulfurization ratio of FCC gasoline heavy distillate reaches 95.73%,sulfur content drops from 850.42 μg/g to 36.32 μg/g with research octane number (RON) loss only 0.6.Hydrodesulfurization rate of catalytic distillation is little lower than that of fixed bed hydrogenation,but its RON loss is obviously lesser.