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通过硝酸钴与硅酸钠共沉淀、辅以正丁醇干燥技术制备了具有原子分散度的Co-O-Si复合氧化物(Co/Si原子比≈ 0.65), 该催化剂具有较大的比表面积(562 m2/g)和较强表面酸性. 在硫化处理后, 能够形成高度分散的硫化物活性组分, 在模型汽油加氢处理反应中显示了较高的催化活性, 在573 K时, 噻吩的加氢脱硫活性可达99.4%, 同时, 1-己烯的骨架异构收率达到了35%. 该催化剂虽然不含Mo, 其加氢脱硫活性可与工业催化剂Co-Mo/γ-Al2O3相当. 而在汽油深度加氢脱硫过程中, 直链烯烃往往被加氢饱和, 造成辛烷值损失. 该催化剂则可使部分直链烯烃发生骨架异构而生成异构烷烃, 可减少深度加氢脱硫过程中的辛烷值损失.
The Co-O-Si composite oxide with atomic dispersion (Co / Si atomic ratio ≈ 0.65) was prepared by coprecipitation of cobalt nitrate and sodium silicate followed by n-butanol drying. The catalyst has a large specific surface area (562 m2 / g) and strong surface acidity.After vulcanization, a highly dispersed sulfide active component was formed, which showed high catalytic activity in the model gasoline hydrotreating reaction. At 573 K, Of the hydrodesulfurization activity of up to 99.4%, at the same time, 1-hexene skeleton isomerisation yield reached 35%. Although the catalyst does not contain Mo, its hydrodesulfurization activity with the industrial catalyst Co-Mo / γ-Al2O3 While in the process of gasoline deep hydrodesulfurization, the linear olefins are often saturated with hydrogen, resulting in the loss of octane number.The catalyst can be part of the linear olefin isomerism and generate isoparaffin, can reduce the depth plus Octane loss during hydrogen desulfurization.