以SBA-15为载体担载Ni-Mo制备深度加氢脱硫催化剂

 以TEOS为硅源、聚环氧乙烷-聚环氧丙烷-聚环氧乙烷三嵌段共聚物表面活性剂（P123）为模板剂，在水热条件下合成了SBA-15，用XRD、N₂ 吸附、HRTEM等方法对其进行了表征。以SBA-15作载体，担载Ni-Mo制备了深度加氢脱硫(HDS)催化剂，在高压固定床反应器上以二苯并噻吩(DBT)和4,6-二甲基-二苯并噻吩(4,6-DMDBT)为模型化合物，考察了以SBA-15作载体的催化剂对DBT和4,6-DMDBT的HDS活性。结果表明，合成的SBA-15具有较高的比表面积、均匀的孔径。SBA-15担载Ni-Mo制备的催化剂表现出较高的加氢脱硫活性，其中Ni/Mo原子比为0.25时，催化剂的加氢脱硫活性最高。

PREPARATION OF DEEP HYDRODESULFURIZATION CATALYSTS BY DEPOSITING Ni-Mo SPECIES ON SILICEOUS SBA-15

Siliceous SBA-15 was synthesized by a conventional hydrothermal method with TEOS as Si resource and PEO-PPO-PEO copolymer (P123) as template. The structure and properties of the synthesized SBA-15 were studied by means of XRD, N2 adsorption, TEM. A deep hydrodesulfurization (HDS) catalyst, which was considerably active to desulfurize dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT), was prepared by depositing Ni-Mo species over SBA-15. It was indicated that the SBA-15 possessed extremely high surface area and even pore diameter, favoring the dispersion of the active species, resulting in very high HDS activity. The optimal Ni/Mo atomic ratio for this series of catalysts is 0.25, with which the Ni-Mo(0.25)/SBA-15 exhibited excellent performance in HDS of DBT and 4,6-DMDBT.