加氢汽油辛烷值损失及博士试验不通过原因分析

Analysis on Reasons for Octane Number Loss in Hydrogenated Gasoline and Doctor's Test Failure

催化裂化(Fluid Catalytic Crackin,FCC)汽油加氢改质-脱硫组合技术能够在深度脱硫、降烯烃的同时保持较高辛烷值。随着运行周期延长及轻汽油改醚化装置的技术改造,催化剂活性下降,高辛烷值组分减少,增大了加氢混合汽油辛烷值损失。在减少辛烷值损失的优化操作过程中,出现加氢汽油博士试验不通过问题,影响产品调和与销售。优化各反应器入口温度、轻汽油抽出比例、循环氢硫化氢含量后,可有效减少辛烷值损失,同时避免加氢汽油博士试验不通过。

The Fluid Catalytic Cracking(FCC)gasoline hydrogenation upgrading desulfurization combination technology can maintain a high octane rating while deeply desulfurizing and reducing olefins.With the extension of operating cycles and the conversion of light gasoline to etherification units,catalyst activity decreases,high octane components decrease,and the octane loss of hydrogenated blended gasoline increases.During the optimization process of reducing octane loss,there was a problem of failure in the doctoral test of hydrogenated gasoline,which affected product blending and sales.After optimizing the inlet temperature of each reactor,the extraction ratio of light gasoline,and the content of circulating hydrogen sulfide,the loss of octane number can be effectively reduced,while avoiding the problem of failure in the doctoral test of hydrogenated gasoline.