Development of sustainable energy technologies and reduction of carbon dioxide in the atmosphere are the two effective strategies in dealing with current environmental issues. Herein we report a Dual Function Material (DFM) consisting of supported sodium carbonate in intimate contact with dispersed Ru as a promising catalytic solution for combining both approaches. The Ru-Na 2 CO 3 DFM deposited on Al 2 O 3 captures CO 2 from a flue gas and catalytically converts it to synthetic natural gas (i.e., methane) using H 2 generated from renewable sources. The Ru in the DFM, in combination with H 2 , catalytically hydrogenates both adsorbed CO 2 and the bulk Na 2 CO 3 , forming methane. The depleted sites adsorb CO 2 through a carbonate reformation process and in addition adsorb CO 2 on its surface. This material functions well in O 2 -and H 2 O-containing flue gas where the favorable Ru redox property allows RuO x , formed during flue gas exposure, to be reduced during the hydrogenation cycle. As a combined CO 2 capture and utilization scheme, this technology overcomes many of the limitations of the conventional liquid amine-based CO 2 sorbent technology.Keywords: supported Ru and sodium carbonate; dual function material; CO 2 capture in flue gas; conversion to synthetic natural gas; redox properties of Ru
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