III International Conference

PP-I-44transferred on nickel through the gas phase (Jumpover-effect) where further hydrogenationup to methane occurred.Atomic hydrogen can move to a catalyst surface through the borders of contact betweenparticles from the nickel centers to copper or iron where it enters the reactions with oxygen.That means that carbon oxides hydrogenation up to alkenes occurs by means of hydrogenspillover.The greatest activity in formation of metane and ethylene show catalysts copper contentin which does not exceed the content of nickel. The equivalent quantity of copper and itsexcess led to lack ofatomic-chemisorbed hydrogen owing to what sharp decrease in activity ofthe catalyst is observed.On all investigated bimetallic catalysts it was observed synergetic effect (growth ofspecific catalytic activity in comparison with monometallic).88