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采用连续碳化法制备SiO_2-Al_2O_3催化材料,考察了连续碳化过程中不同反应浆液pH值下硅的加入对SiO_2-Al_2O_3催化材料性质的影响,通过XRD、BET、FT-IR和固体核磁共振等方法对试样进行表征。实验结果表明:反应浆液pH值为11.0时加硅制备的SiO_2-Al_2O_3催化材料物化性质最好,其孔容达到1.060cm~3/g,比表面积为345m~2/g,总酸含量为0.495mmol/g。将合成的SiO_2-Al_2O_3催化材料制成催化剂,并在高压反应釜上进行渣油加氢性能评价,评价结果表明:反应浆液pH值为11.0时,加入硅合成的SiO_2-Al_2O_3催化材料制备的催化剂,脱硫率为78.3%,脱残炭率为54.1%,脱(Ni+V)率为96.4%,大于500℃的渣油转化率达到57.1%。
The effects of silicon addition on the properties of SiO_2-Al_2O_3 catalyst under continuous reaction conditions were investigated by XRD, BET, FT-IR and solid state nuclear magnetic resonance The samples were characterized. The experimental results show that the physical and chemical properties of the prepared SiO_2-Al_2O_3 catalyst are the best when the pH value of the reaction slurry is 11.0. The pore volume is 1.060cm 3 / g, the specific surface area is 345m 2 / g and the total acid content is 0.495 mmol / g. The synthesized SiO 2 -Al 2 O 3 catalyst was made into a catalyst and the residue hydrogenation performance was evaluated on the autoclave. The evaluation results showed that when the pH value of the reaction slurry was 11.0, the catalyst prepared by the synthesis of SiO 2 -Al 2 O 3 catalyst , The desulfurization rate was 78.3%, the rate of removal of carbon was 54.1%, the rate of Ni + V removal was 96.4%, and the conversion of residual oil of more than 500 ℃ reached 57.1%.