Catalytic tests for carbon dioxide hydrogenation are reported over nickel base catalysts, in the temperature range of 350-550 ̊C under atmospheric pressure. The catalysts with Ni loadings ranging from 12 to 22%wt. were prepared by impregnation technique, characterized, and their performances were evaluated in CO2 conversion. The important parameters namely reaction temperature, H2/CO2 molar ratio, GHSV and regeneration procedures were taken into account and optimized. The main experimental results (very high CO2 conversion together with almost total methane selectivity, obtained up to 400 ̊C) asserted the Ni/Al2O3-SiO2 as a potential catalyst for CO2 conversion. This method simultaneously possesses the merits of promising methanation performances over a low cost of catalyst and raw material, reusing CO2 and generating CH4 fuel as a possible source of energy. Key-Words: Ni catalysts, catalytic process, impregnation technique, methanation, hydrogenation 1 Author to whom all correspondence should be addressed: E-mail: adriana.marinoiu@icsi.ro