Combined hydrogenation of carbon oxides on catalysts bearing iron and nickel nanoparticles

The reaction of the hydrogenation of a mixture of carbon oxides on ultradisperse powder (UDP) catalysts containing Fe and Ni nanoparticles and their bimetallic mechanical mixtures was investigated. It was established that the main reaction product on UDP Ni is methane, while the main products on the bimetallic systems are methane and ethylene. A synergetic effect was observed on the bimetallic catalyst under investigation. It was revealed that the hydrogenation of a mixture of carbon oxides proceeds through the stage of dissociative adsorption of both components, CO and CO2. The olefin selectivity of the process was explained by the participation of different forms of adsorbed hydrogen (HI : HII) at the catalyst surface. It is assumed that the hydrogenation of carbon oxides on iron-nickel catalysts proceeds either through the jumpover effect or via hydrogen spillover. © Pleiades Publishing, Ltd., 2011

Bimetallic systems containing Fe, Co, Ni, and Mn nanoparticles as catalysts for the hydrogenation of carbon oxides

The hydrogenation reaction of carbon dioxide and a mixture of carbon oxides on bimetallic catalytic systems containing nanoparticles of Fe, Ni, Co, and Mn supported on an inert carrier is studied. It is found that the ratio of saturated and unsaturated hydrocarbons in the hydrogenation products and the synergistic effect are determined mainly by the number of hydrogen atoms that are capable of migrating from one active center to another and by composition of those centers. Differences in the catalytic activity and selectivity of the bimetallic samples are explained by different rates of the spillover of weakly bound hydrogen (H I) and the different rates of the jumpover of CH x radicals from one center to another at which their further hydrogenation takes place. © 2012 Pleiades Publishing, Ltd

Bimetallic systems containing Fe, Co, Ni, and Mn nanoparticles as catalysts for the hydrogenation of carbon oxides

The hydrogenation reaction of carbon dioxide and a mixture of carbon oxides on bimetallic catalytic systems containing nanoparticles of Fe, Ni, Co, and Mn supported on an inert carrier is studied. It is found that the ratio of saturated and unsaturated hydrocarbons in the hydrogenation products and the synergistic effect are determined mainly by the number of hydrogen atoms that are capable of migrating from one active center to another and by composition of those centers. Differences in the catalytic activity and selectivity of the bimetallic samples are explained by different rates of the spillover of weakly bound hydrogen (H I) and the different rates of the jumpover of CH x radicals from one center to another at which their further hydrogenation takes place. © 2012 Pleiades Publishing, Ltd

Combined hydrogenation of carbon oxides on catalysts bearing iron and nickel nanoparticles

The reaction of the hydrogenation of a mixture of carbon oxides on ultradisperse powder (UDP) catalysts containing Fe and Ni nanoparticles and their bimetallic mechanical mixtures was investigated. It was established that the main reaction product on UDP Ni is methane, while the main products on the bimetallic systems are methane and ethylene. A synergetic effect was observed on the bimetallic catalyst under investigation. It was revealed that the hydrogenation of a mixture of carbon oxides proceeds through the stage of dissociative adsorption of both components, CO and CO2. The olefin selectivity of the process was explained by the participation of different forms of adsorbed hydrogen (HI : HII) at the catalyst surface. It is assumed that the hydrogenation of carbon oxides on iron-nickel catalysts proceeds either through the jumpover effect or via hydrogen spillover. © Pleiades Publishing, Ltd., 2011

Synthesis of olefins from CO and H2 at atmospheric pressure on Fe- and MnO2-containing nanosystems

The possibility of producing olefins from a mixture of carbon monoxide with hydrogen at atmospheric pressure on catalysts containing Fe and MnO2 nanoparticles on inert supports was studied. The differences in the catalytic activity and selectivity are attributed to the different rates of spillover of the weakly bound hydrogen (HI) and also to the rate of jumpover of the CHx radicals from one center to another. © 2013 Springer Science+Business Media New York