ADRIANA MARINOIU, ELENA CARCADEA, CLAUDIA COBZARU, CORINA CERNATESCU NUMERICAL APPROACH FOR CATALYTIC CONVERSION OF CO2 TO METHANE OVER NICKEL BASE CATALYSTS The study evaluates the performances of the Ni/Al2O3-SiO2 base catalysts prepared by impregnation technique by catalytic hydrogenation of CO2 to methane on temperature range of 350-550oC under atmospheric pressure. We take into account the important parameters namely reaction temperature, H2/CO2 molar ratio. Targeting a very high conversion rate of CO2 and almost total methane selectivity at up to 400oC catalysts like Ni/Al2O3-SiO2 were proposed. The performances of these catalysts were analysed by table Curve software. The mathematical model corresponding to the characteristic equation provides a good arrangement of the experimental points on the responding surface, simplicity of the characteristic equation and a good determination coefficient that is near unity.
Key words: Ni catalysts, catalytic process, impregnation technique, hydrogenation