Coal tar light oil (CTLO), an unclean byproduct of coal chemical industry, is a potential material for the manufacture of high-octane gasoline blending component. CoMo/η-Al₂O₃, a catalyst with lower desulfurization performance but less octane loss, is selected from four catalysts to further reduce sulfur content of CTLO by phosphorus modification. Catalysts modified by various content of phosphorus are characterized by a series of methods. The results show that addition of appropriate amount of phosphorus can improve the structure and acidity of catalysts, and weaken the interaction between active component and carrier. Furthermore, most of naphthalene in CTLO is converted into tetralin with 1.5 wt% phosphorus loading, and tetralin can play an important role of hydrogen transfer during catalytic hydrogenation process, which promotes the removal of heteroatom compounds. When the loading of phosphorus is 1.5 wt%, the content of S, N heteroatom compounds is only 7.2 mg/kg, 0.021% in product oil respectively, which is beneficial to reduce automobile emissions. Meanwhile, the RON reaches 105.3, and only decreases by 2.2 units compared to the original CTLO. Product oil catalyzed by CoMoP1.5/η-Al₂O₃ can be used as excellent high-octane gasoline blending component with low sulfur.

煤焦油轻油（CTLO）是煤化学工业的不清洁副产品，是制造高辛烷值汽油调和组分的潜在材料。CoMo / η- Al ₂ O ₃从四种催化剂中选择具有较低脱硫性能但辛烷值损失较少的催化剂，以通过磷改性进一步降低CTLO的硫含量。被各种磷含量改性的催化剂通过一系列方法进行表征。结果表明，加入适量的磷可以改善催化剂的结构和酸度，并减弱活性组分与载体之间的相互作用。此外，CTLO中的大部分萘都被转变成磷含量为1.5 wt％的四氢萘，并且四氢萘在催化加氢过程中起着氢转移的重要作用，从而促进了杂原子化合物的去除。当磷的含量为1.5wt％时，S ，N的含量产品油中的杂原子化合物分别仅为7.2 mg / kg和0.021％，这有利于减少汽车排放。同时，RON达到105.3，与原始CTLO相比仅降低了2.2个单位。CoMoP1.5 / η- Al ₂ O ₃催化的产物油可用作低硫的优良高辛烷值汽油调合组分。