利用现有柴油加氢装置生产重整原料的探索与工业实践

研究利用现有柴油加氢装置生产重整原料的方案，考察不同类型加氢精制催化剂、加氢裂化催化剂以及原料油转化率对柴油加氢裂化反应的影响，筛选出了适宜的加氢精制与加氢裂化催化剂体系。研究发现，在相同反应条件下，Ni-Mo型加氢精制催化剂的加氢脱硫、脱氮以及芳烃饱和性能更好，更适合作为柴油加氢裂化生产重整原料的精制催化剂。在轻油型加氢裂化催化剂体系下，所产石脑油馏分的芳烃含量以及芳烃潜含量（芳潜）最高；在高中油型加氢裂化催化剂体系下，柴油产品十六烷值更高。某炼油厂2.6 Mt/a柴油加氢装置采用该方案后，石脑油收率由改造前的6.47%提升至10.47%，石脑油芳潜由44.5%增加到47.9%，实现了多产高芳潜重整原料的结构调整目标。

EXPLORATION AND INDUSTRIAL PRACTICE OF USING EXISTING DIESEL HYDROTREATING UNIT TO PRODUCE REFORMER FEEDSTOCK

The scheme of using the existing diesel hydrotreating unit to produce reformer feedstock was studied. The effects of different types of hydrotreating catalysts, hydrocracking catalysts and conversion rate on hydrocracking reaction of diesel oil were investigated, and the suitable hydrotreating and hydrocracking catalyst system was selected. It was found that under the same reaction conditions, Ni-Mo hydrotreating catalyst had better hydrodesulfurization, denitrification and aromatics saturation performance, and was more suitable as a refining catalyst for hydrocracking of diesel oil to produce reformer feedstock. In light oil hydrocracking catalyst system, the aromatics and aromatic potential content of naphtha fraction were the highest, and in major middle oil hydrocracking catalyst system, the cetane number of diesel oil is higher. The yield of naphtha was increased from 6.47% to 10.47%, and the aromatic potential content of naphtha was increased from 44.5% to 47.9% in a 2.6 Mt/a hydrotreating unit of diesel oil, to achieve the goal of structural adjustment of raw materials for producing more reformer feedstock with high aromatic potential content.