氢油比对柴油加氢脱硫和芳烃饱和选择性的影响

为了更好地了解氢油比对柴油加氢精制过程的影响进而通过工艺参数优化提高装置的运转周期和生产效益，以多个炼油厂直馏柴油与催化裂化柴油的混合油为原料，考察了不同氢油比下的柴油加氢脱硫性能和多环芳烃、单环芳烃饱和性能以及反应的氢气有效利用率。通过向原料中添加多环芳烃菲，考察原料中增加多环芳烃后的反应性能，分析了增加氢油比提升反应性能的原因。试验结果表明：在氢油比过量的情况下，继续提高氢油比能够提高原料油的雾化效果，进而促进脱硫和多环芳烃饱和反应，可以在较低的反应温度下生产国Ⅵ柴油，从而延长装置的运转周期；同时，高氢油比能够在一定程度上抑制单环芳烃的饱和，降低氢气消耗，提高氢气有效利用率。

EFFECT OF THE RATIO OF HYDROGEN TO OIL ON DESULFURIZATION AND AROMATICS SATURATION SELECTIVITY IN DIESEL HYDROTREATING PROCESS

In order to better understand the influence of the ratio of hydrogen to oil on diesel hydrotreating process and improve the operation cycle and production benefit of the unit by optimizing the process parameter, the mixture oil of straight run diesel and catalytic cracking diesel from multiple refineries was used as feedstock. The hydrodesulfurization performance of diesel, the saturation performance of polycyclic aromatic hydrocarbons and monocyclic aromatic hydrocarbons and the effective utilization rate of hydrogen were investigated. By adding polycyclic aromatic phenanthrene to the feedstock, the reaction performance of the feedstock was investigated, and the reason of increasing the ratio of hydrogen to oil to improve the reaction performance was analyzed. The results show that increasing the ratio of hydrogen to oil can improve the atomization effect of feedstock, further promote the desulfurization and polycyclic aromatic hydrocarbon saturation reaction, and China Ⅵ diesel can be produced at lower reaction temperature, so as to prolong the operation cycle of the unit. At the same time, high ratio of hydrogen to oil can inhibit the saturation of monocyclic aromatic hydrocarbons to a certain extent, reduce hydrogen consumption, so as to improve the effective utilization rate of hydrogen.