微量杂质对柴油深度加氢脱硫的影响

从柴油加氢脱硫反应过程中存在的相态出发，在中型加氢试验装置上研究了气相中的CO和原料油中携带的硅等杂质对柴油深度加氢脱硫反应的影响。结果表明：气相中的CO杂质对催化剂的脱硫活性具有抑制作用，随着CO浓度的增大，这种抑制作用加大，但是在其达到一定程度后再继续提高CO浓度，其对加氢脱硫活性的抑制作用基本不变，CO对催化剂活性的抑制是可逆的；液相中携带的含硅化合物会使催化剂中毒，使其加氢脱硫活性大幅降低，影响催化剂的使用周期，当SiO2沉积量为3.31%时，催化剂的加氢脱硫活性损失在10 ℃以上。

INFLUENCE OF TRACE IMPURITIES ON DEEP HYDRODESULFURIZATION OF DIESEL

The influence of carbon monoxide (CO) in the gas phase and silicon (Si) in the liquid phase on diesel deep hydrodesulfurization was studied. The results show that CO inhibits the HDS performance of catalyst and with the increase of CO concentration; the inhibition increases and then gradually becomes mild. However, the inhibition of CO is reversible. The Si in liquid phase poisons the catalyst and shortens the catalyst lifetime. It is found that when the SiO2 deposition reaches 3.31%, the activity loss of catalyst is more than 10 ℃.