关键词: 焦化轻油, 加氢脱硫, 高辛烷值, 汽油调和组分

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