Synthesis of Mesoporous Ni-Mo Mixed Oxides with Urea Method

Mesoporous Ni-Mo mixed oxide was synthesized using urea method. The Ni-Mo mixed oxide and precursor were characterized by X-ray powder diffraction analysis (XRD), low temperature nitrogen adsorption-desorption, HRTEM, TG-DTA., FTIR techniques, and the optimum calcination temperature of Ni-Mo mixed oxide precursors was determined. The mesoporous Ni-Mo catalyst was prepared with the Ni-Mo mixed oxides and its activity of hydrodesulfurization(HDS) was also evaluated in a continuous flow micro-reactor using dibenzothiophene(DBT) as a model compound. The Ni-Mo mixed oxide has higher specific area of 124 m(2).g(-1), proper pore volume of 0.22mL.g(-1), and ideal average pore size of 5.8 nm. The evaluation results show that the catalyst has excellent performance for hydrodesulfurization, when the reaction temperature is 280 degrees C, the desulfurization rate is 100%, which is much higher than the conventional catalyst Ni-Mo/Al2O3.