Hydrogenation of CO2 on carbon-supported nickel and cobalt |
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| Authors: | A Guerrero-Ruiz and I Rodríguez-Ramos |
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| Institution: | (1) Departamento de Quimica Inorgánica, Facultad de Ciencias, 18071 Granada, Spain;(2) Present address: Departamento de Quimica Inorgánica, Facultad de Ciencias, Universidad de Alicante, Alicante, Spain |
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| Abstract: | The hydrogenation of CO2 has been studied at atmospheric pressure on Co/C and Ni/C catalysts and the results are compared with those obtained on unsupported Co and Ni. Specific activites in the form of turnover frequencies for CO2 hydrogenation decrease with increasing metal dispersity. Carbon supported Co and Ni present a smaller selectivity for methane than bulk metals. Higher specific activities and smaller activation energies are obtained on Co catalysts, compared with those determined for Ni catalysts.
         CO2            Co/  Ni/    Co Ni   .    CO2  . Co Ni , .   .
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