Comow/al203-mgo-li2o catalytic formulations for DBT hydrodesulphurization

Low acidity catalytic formulations were prepared incorporating MgO and Li2O to the conventional CoMoW / Al2O3 catalysts. The CoMoW active phases were impregnates using an ammoniacal solution containing the metallic complexes as citrates. A high dispersion of the Co, Mo and W species in octahedral coordination, inhibiting the agglomeration towards phase like MoO3, WO3 and Co3O4, was attained. The obtained formulations preserve the catalytic activity in the hydrodesulphurization (HDS) reaction of dibenzothiphene (DBT), enhancing the selectivity towards the direct desulphurization route. The prepared formulations show a lower hydrogenation function due to its low acidity.