Berlin 2015 – scientific programme

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AKE: Arbeitskreis Energie

AKE 9: Energy Storage II

AKE 9.4: Talk

Tuesday, March 17, 2015, 15:00–15:15, A 151

Self restriction oft the Sabatier reaction in large scale — •Johannes Israel, Fabian Rachow, Carola Schwiertz, Evgenia Charlafti, Klaus Müller, and Dieter Schmeißer — Brandenburg University of Technology, Applied Physics and Sensors, Konrad-Wachsmann-Allee, 03046 Cottbus, Germany

A main goal for a sustainable energy supply is a long term energy storage system. One opportunity in this research field is the power to gas concept, where the produced gas can be fed in the existing network of natural gas. Here we show in a technical scale how the direct CO₂ conversion to methane according the Sabatier reaction, CO₂ + 4 H₂ → CH₄ + 2H₂O , is self organized. At a certain limit of gas flow, a steady state equilibrium of exothermic heat production and thermal flow is reached and the reaction needs no further external annealing. We find for the maximum volume rate at the steady state equilibirum a shift of around 250 ^∘C above the optimized temperature of the catalytic supported chemical equilibrium. It is shown that also with this setup the used catalyst works with a stable conversion higher than 80 % under the reached temperature and given pressure conditions.