Berlin 2015 – scientific programme

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AKE: Arbeitskreis Energie

AKE 9: Energy Storage II

AKE 9.2: Talk

Tuesday, March 17, 2015, 14:30–14:45, A 151

CO₂ Methanation with different gas mixtures — •Fabian Rachow, Johannes Israel, Carola Schwiertz, Evgenia Charlafti, Klaus Müller, and Dieter Schmeißer — Brandenburg University of Technology, Applied Physics and Sensors, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany

A key issue in the Energiewende in Germany is the storage of excess energy, as it enables energy management systems to react to fluctuating sources and enhances the flexibility of an energy mix. Power to Gas may be the most reasonable approach to store the energy in the form of hydrogen or synthetic natural gas.

We study the direct conversion of CO₂ by the Sabatier reaction to gain a methane based mixture which can replace natural gas in CHP plants and gas motors and can help to partially reduce the CO₂ emission. In laboratory scale we investigated the performance (with IR and QMS) of Ni-based catalyst for different sources of CO₂ like clean CO₂, CO₂ emitted as flue gas from an Oxyfuel power plant or a synthetic mixture with O₂, N₂ and SO₂ in concentration typical for conventional power plants. Measurements from an up-scaled system are also presented, showing data important for a technical application. Here, we are able to convert more than 200kg CO₂/day with conversion rates up to 90%.