Abstract: In order to prepare high octane gasoline blending component from light oil of coal tar，benzene，unsaturated hydrocarbons and sulfur components were removed by rectification，pre-hydrogenation on NiMo/γ-Al2O3 and hydrodesulfurization on CoMo/γ-Al2O3 respectively. The effects of two processes (rectification-hydrogenation and hydrogenation-rectification) on benzene，sulfur content and octane number in intermediates and product were compared，and the results indicated that the former was better and more effective. On this basis，the influences of process parameters on hydrodesulfurization were investigated，and the optimal technological conditions were as follows：temperature 300 ℃；pressure 3.0 MPa；H2/oil ratio 900∶1 and liquid hourly space velocity 0.4 h?1. Under the optimal conditions，desulfurization rate reached 98.73%，benzene content (0.96%) and sulfur content (36 mg/kg) completely met the requirements of motor gasoline national standard IV. Furthermore，the light oil of coal tar treated by the optimal process could be used as high-aromatic and high octane gasoline component，whose nitrogen content was 87 mg/kg，bromine number was 0.45 and octane number was up to 112.1.

Key words: light oil of coal tar, hydrodesulfurization, high octane number, gasoline blending component

摘要： 以焦化轻油为原料，通过精馏脱除苯，预加氢采用NiMo/γ-Al2O3脱除不饱和组分，主加氢在CoMo/γ-Al2O3作用下完成脱硫来制备高辛烷值汽油调和组分。比较了先精馏后加氢和先加氢后精馏两种工艺对产品中苯、硫含量和辛烷值的影响，确定了最佳工艺。在此基础上，探讨了工艺参数对加氢脱硫的影响，最优的工艺条件为：温度300 ℃、压力3.0 MPa、氢油比900∶1、液体空速0.4 h?1。在此工艺条件下脱硫率为98.73%，产物中苯含量0.96%和硫含量36 mg/kg均符合车用汽油国家标准Ⅳ的要求；此外，加氢产品的氮含量为87 mg/kg，溴价为0.45，辛烷值达112.1，焦化轻油经本工艺处理后可作为高芳高辛烷值汽油调和组分。

关键词: 焦化轻油, 加氢脱硫, 高辛烷值, 汽油调和组分