AROMATICS SATURATION BY SULFIDED NICKEL-MOLYBDENUM HYDROTREATING CATALYSTS

The effect of H2S on the rates of toluene hydrogenation of sulfided Mo , Ni, Ni-Mo and Ni-Mo-P/alumina catalysts has been determined at 6 MPa , 350 degrees C over a large range of H2S partial pressure. In those c onditions, Ni/alumina is nearly inactive. For the three other catalyst s, similar trends are found with in particular no effect of H2S at hig h partial pressure. In the presence of NH3, the effect of H2S remains globally the same.