FCC汽油预加氢工艺试验研究

Test study on pre-hydrotreating process for FCC gasoline

对FCC汽油进行预加氢硫醚化处理,通过二烯烃和硫醇的醚化反应可脱除FCC汽油中的硫醇,降低二烯烃含量。实验室采用预加氢催化剂对FCC汽油预加氢硫醚化反应进行试验考察,试验结果表明:对于双烯值2.63gI/(100 g),硫醇、硫质量分数分别为158μg/g和680μg/g的FCC汽油,最佳反应条件为温度130℃、氢油比5、体积空速3 h-1、压力2.0 MPa;工艺参数优化试验结果表明:在最佳反应条件下,FCC汽油双烯脱除率为59%,硫醇脱除率为97%,RON损失0.2单位,烯烃减少量为0.3%,预加氢前后FCC汽油总硫含量不改变。

The mercaptan in FCC gasoline can be removed and dienes can be reduced by sulfur etherifi- cation reaction of dienes and mercaptan in FCC gasoline. The investigation by laboratory testing of sulfur ether- ification using pre-hydrotreating catalyst for FCC gasoline was performed. The test results show that, for the FCC gasoline with 2.63 gI/（100g） dienes value, 158 ppm mercaptan, 680 ppm sulfur, the optimum reaction conditions are 130 ℃ temperature, 5 hydrogen to oil ratio, 3 h-1 space velocity and 2.0 MPa pressure. And the parameters optimization test results demonstrate that, under the optimum reaction conditions, the removal rate of dienes in FCC gasoline is 59%, the mercaptan removal rate is 97%, the RON loss is 0.2 units, and the olefin reduction is 0. 3%. There is no change in total sulfur before and after pre-treatment of FCC gasoline.