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The effects of Y_2O_3 on the property of NiO/Al_2O_3 catalyst forcatalytic partial oxidation of methane were investigated in a continuous flowfixed bed reactor(20 mm i.d.,860 mm long).The catalysts werecharacterized by XRD and pore measurement.For comparison,similar studieswere carried out for the catalysts loaded with Zr or W oxide.The results showthat different additives and impregnating methods could greatly affect thedispersion of component Ni.The catalytic activity,the selectivity to CO andthe stability are improved because of the less facile interation between thesupport and nickel oxide,greater surface area and better dispersion of metalNi for NiO/Al_2O_3 catalyst modified by Y_2O_3.
The effects of Y 2 O 3 on the property of NiO / Al 2 O 3 catalyst for catalytic partial oxidation of methane were investigated in a continuous flow mixed bed reactor (20 mm id, 860 mm long). The catalysts were characterized by XRD and pore measurement. For comparison, similar studieswere carried out for the catalysts loaded with Zr or W oxide. The results show that different different additives and impregnating methods could greatly affect the dispersion of component Ni. The catalytic activity, the selectivity to CO and the stability are improved because of the less facile interation between the support and nickel oxide , greater surface area and better dispersion of metal Ni for NiO / Al 2 O 3 catalyst modified by Y 2 O 3.