Equilibrium Analyses and Kinetics of Carbon Dioxide Methanation Using an Alumina‐Supported Ruthenium Catalyst

With CO 2 being accepted as the main cause of the climate change, considerable efforts currently focus on capturing CO 2 from major point sources and to store it. Another, better way is to utilize the captured CO 2 to produce useful fuels like methane. The Sabatier reaction was studied in this work, using 0.5 % ruthenium on alumina as catalyst. A quartz reactor packed with catalyst particles and placed in a vertical furnace was employed. A stoichiometric ratio of CO 2 /H 2 was used and the temperature was changed between 150 and 400 °C, while the flow rate of the feed gas mixture was varied between 250 and 625 mL min −1 , with different amounts of catalyst. The temperature was identified as the major parameter affecting the conversion. Carbon dioxide conversions greater than 85 % were obtained at temperatures higher than 350 °C.