Investigation On The Hydrodesulrization Performance Of The MoO_x·REHY Catalyst

In this paper,the MoO_x·REHY?CoMo·REHY₁₂2 and NiMo·REHY₁₂catalysts were prepared by isometric impregnation methods,and characterized by XRD?NH₃-TPD and BET methods.The hydrodesulrization?HDS?performance of the catalysts were evaluated by using 0.6m%dibenzothiophene?DBT?/decane as the model reactant in the high-pressure micro-reactor.The results indicated that,the crystalline phase peak attributable to REHY keeped intact of the catalysts prepared under the experimental conditions,there are not other crystalline phase peaks were found.The active of MoO_x·REHY₁₂2 catalyst prepared at 650?was mostly assembled into the REHY zeolite in the form of metal-oxygen clusters,causing the unit cell parameters decrease,the acid content increase and the specific surface area decreased.It was found that Ni and Co promoters have little influence on the unit cell parameters,the acid content and the specific surface area of the MoO_x·REHY₁₂ catalyst.The DBT HDS conversion of the sulfide catalyst of the MoO_x·REHY₁₂with 5.0 m%Mo prepared at 650?reached to 29.40%?46.01%and 84.88%under the reaction condition of 270??290?and 310?,4.0 MPa and space velocity 40 h^-1,increased by 15.39%?13.37%and 24.03%compared to MoO_x·REHY₁₂ catalyst prepared at 520?,increased by 3.55%?-0.76%and6.77%compared to MoO_x·REHY₀ prepared at 650?,and increased by21.08%?25.11%and 51.91%compared to MoO₃/Al₂O₃ with 30m%Mo prepared at 550??Co?Ni additives added to the MoO_x·REHY₁₂ catalysts have little impact on the cell parameters?the amount of acid?specific surface area and the activity of the DBT HDS.