Preparation,Characterization and Hydrodesulphurization Catalytic Performance of Al-Ni_2P/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%.