FCC汽油重馏分催化蒸馏加氢脱硫研究

Hydrodesulfurization of FCC Gasoline Heavy Cut with Catalytic Distillation

利用LH-02型常规加氢脱硫催化剂,在催化蒸馏小试装置上对FCC汽油重馏分进行了加氢脱硫研究。在压力(表压)1.7MPa、床层平均温度286℃、氢油体积比200、体积空速2h-1、回流比3的条件下,FCC汽油重馏分脱硫率达到92.4%,总硫质量分数由1480μg/g降到112μg/g;脱硫后的重馏分油与FCC轻馏分油调合得到的脱硫后FCC汽油,总硫质量分数由1107μg/g降到295μg/g,抗爆指数损失2.0个单位;脱硫后的重馏分油与醚化后的FCC轻馏分油调合得到的脱硫后FCC醚化汽油,总硫质量分数为289μg/g,抗爆指数损失1.0个单位;脱硫后的FCC汽油性质良好,部分性质指标有较大幅度改善;液体收率高达99.6%以上。

Using conventional hydrodesulfurization catalyst LH-02, studied hydrodesulfurization of FCC gasoline heavy cut with catalytic distillation on a bench-scale plant. The desulfuration rate of FCC gasoline heavy distillate arrived at 92.4 % and total sulfur dropped to 112 μg/g from 1 480 μg/g under operating conditions of pressure 1.7 MPa(g), bed average temperature 286 ℃, H2/Oil volume ratio 200, LHSV 2.0 h~ -1and reflux ratio 3.0. The total sulfur of FCC gasoline produced by blending the heavy cut after desulfurization and the light cut fell from 1 107 μg/g to 295 μg/g,and its (R+M)/2 loss was about 2.0. The total sulfur of FCC etherified gasoline produced by blending the heavy cut after desulfurization and the light cut after etherification was 289 μg/g, and its (R+M)/2 loss was 1.0. The properties of FCC gasoline after desulfurization was good and some indexes were improved at large extent. Liquid yield was high,exceeding 99.6 %.