Al-Ni2P/SBA-15催化剂的制备、表征及加氢脱硫催化性能

以磷酸氢二铵为磷源，硝酸镍为镍源，硝酸铝为助剂铝源，制备了n_P/n_Ni=0.8，Al含量为1.06wt%~6.35wt%的一系列Al-Ni₂P/SBA-15催化剂。采用XRD、TEM和N₂吸脱附等技术对催化剂的结构进行了表征研究，以二苯并噻吩(DBT)作为模型化合物，在微型固定床反应器上对催化剂的加氢脱硫(HDS)性能进行了评价。结果表明，Al修饰的Al-Ni₂P/SBA-15催化剂仍然保持介孔结构，当Al含量低于5.29wt%时，催化剂的物相主要是Ni₂P，当Al含量在5.29wt%-6.35wt%之间时，催化剂的物相为Ni₂P和Ni₁₂P₅。Al含量为4.24wt%的3-Al-Ni₂P/SBA-15催化剂具有最好的二苯并噻吩加氢脱硫催化活性，在反应温度为360 ℃，反应压力为3.0 MP的条件下，3-Al-Ni₂P/SBA-15催化剂对二苯并噻吩的转化率可达99.0%。

Preparation, Characterization and Hydrodesulphurization Catalytic Performance of Al-Ni2P/SBA-15 Catalysts

A series of Al-Ni2P/SBA-15 catalysts with initial P/Ni molar ratio of 0.8 were prepared using (NH4)2HPO4 as a source of phosphorus, Ni(NO)3 as a source of nickel, and Al content from 1.06wt% to 6.35wt%. The catalysts were characterized by XRD, TEM and N2 adsorption-desorption. The catalytic performances of the hydrodesulfurization (HDS) were evaluated in a fixed-bed micro-reactor using dibenzothiophene (DBT) as the model compound. The results showed that the catalysts modified by Al still maintained the mesoporous structure. The Ni2P phase was mainly observed in the Al-Ni2P/SBA-15 catalysts when Al content was less than 5.29wt%. The Ni2P phase and Ni12P5 phase were found when Al content was from 5.29wt%to 6.35wt%. The 3-Al-Ni2P/SBA-15 catalyst with Al content of 4.24wt% had the best catalytic activity for the HDS of the DBT. Under the reaction conditions of 3.0 MPa, 360 ℃, the activity of the 3-Al-Ni2P/SBA-15 catalyst can reach 99.0%.