Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Surface Chemical Reactions and Heterogeneous Catalysis II

O 20.4: Vortrag

Montag, 11. März 2013, 16:45–17:00, H33

Sabatier based Methanation of carbon dioxide and Catalyst stability against contaminations — •Fabian Rachow, Klaus Müller, and Dieter Schmeißer — Brandenburg University of Technology, Applied Physics and Sensors, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany

The Sabatier-Reaction [CO2 + 4H2CH4 + 2H2O] represents a possible way for the reduction and utilization of CO2 produced in the oxy-fuel combustion process. While using different ruthenium and nickel based catalysts we studied the catalytic performance with quadrupole mass spectroscopy and IR-spectroscopy in terms of conversion of CO2, yield of CH4, selectivity and stability. Conversions of up to 90% and a selectivity of well above 95% could be achieved. Further studies focus on the long term stability, especially with the influence of contaminations like SOx and NOx as they may occur in oxy-fuel or flue gas and could greatly reduce the life time of a catalyst. We investigate the limits of Ni based catalysts for those additives. However, technical oxy-fuel gas seems to have no particular effect on the activity of a commonly used NiO-catalyst when compared to quasi pure CO2, showing only a small drop of performance after five days with a constant conversion rate of over 80% at the end.

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