Several base metal and base metal oxide CO2 reduction catalysts were selected to determine catalytic effectiveness in promoting the reduction of carbon dioxide by hydrogen to methane and water. A catalytic reactor having a length to diameter ratio of five was designed and fabricated. Each catalyst was then evaluated individually in a series of continuous reaction runs. Each experimental series was conducted over the temperature range of 450 to 800 F with the equivalent flow of 2.2 lbs CO2 per day being processed through the reactor. The catalysts which were evaluated included cobalt-on-alumina, copper- on-alumina, thorium-on-alumina, and two types of molybdena-on-alumina. The cobalt catalyst proved to be the most effective for promoting the Sabatier or methanization reaction. A peak conversion efficiency of 64% at a temperature of 700 F at atmospheric pressure was obtained for this catalyst. The conversion efficiencies for the other catalysts ranged from essentially zero to 13%. The hydrogen to carbon dioxide flowrate ratio was maintained at 4.36 during all of the experimental runs. Each catalyst was periodically examined during the experimental program to determine and correlate changes in physical properties with catalytic effectiveness.