Abstract
This study was conducted to determine the precise optimum atomic ratio of Co to Mo, at which the activity of hydrodesulfurization over Co-Mo-Al2O3 is maximum. For this purpose, over a series of catalysts, which are preferable with respect to the uniformity of impregnants and in which the concentrations of impregnants were varied in wide range of from about 3 to 16wt% of MoO3 and from 0 to 6wt% of CoO, the hydrodesulfurization activities were measured. It was shown that the optimum ratio of Co to Mo depends to a significant extent upon the concentration of impregnated MoO3. This result was discussed on the basis of the fact that the dispersed state of MoO3 on carrier varied with the increases of the ratio and the concentration of MoO3.
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