Applied Catalysis A: General, Vol.153, No.1-2, 141-156, 1997
Effects of Small MoO3 Additions on the Properties of Nickel-Catalysts for the Steam Reforming of Hydrocarbons
Bimetallic Ni-Mo catalysts deposited on alumina show unusual properties when used in the steam reforming of hydrocarbons. An introduction of small amounts of molybdenum compounds (less than or equal to 0.1 wt.-%) considerably reduces the detrimental effect of carbon deposit formation and increases the activity of methane steam reforming. With larger amounts, one observes a decrease in the catalyst activity, although it is much smaller than the reduction of the coking rate. The properties of the Ni-Mo/Al2O3 catalysts depend on the hydrogen-steam ratio in the reaction mixture which affect the mean degree of oxidation and distribution of various molybdenum states on the surface.
Keywords:BIMETALLIC CATALYSTS;CARBON DEPOSITION;PT-MO/SIO2 CATALYSTS;RHODIUM CATALYSTS;SURFACE-STRUCTURE;MOLYBDENUM;REDUCTION;METHANATION;RESISTANCE;ADSORPTION