Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Surface Chemical Reactions and Heterogeneous Catalysis II

O 20.5: Vortrag

Montag, 11. März 2013, 17:00–17:15, H33

Reaction kinetics of the Sabatier Reaction in a demonstration plant — •Johannes Israel, Klaus Müller, Fabian Rachow, Guido Beuckert, and Dieter Schmeißer — Technische Universität Cottbus, Applied Physics / Sensor Technologie, Germany

We currently build up a demonstration plant for the direct catalytic conversion of CO2 into methane according to the Sabatier reaction CO2 + 4 H2CH4 + 2 H2O.

We have already reached conversion rates higher than 90% and a selectivity close to unity in our laboratory experiments with NiO based catalysts. A good long term stability was obtained with a reactant gas flow density of 0.8 l/min · cm2 at 350C.

We will study the process now on a larger scale with a factor 10000. The process is controlled via mass flow controllers with a throughput of 20 m3/h H2 and 5 m3/h CO2 at an inlet gas pressure of up to 15 bar, the temperature is regulated by a PID multichannel controller. As water is a by-product we use an efficient cooling trap for its separation form the obtained methane. The reaction products are analyzed by a quadrupole mass spectrometer under reaction conditions.

We start our experiments in using clean CO2 and H2. Later experiments will involve industrial quality (oxy-fuel) conditions also. Goal of this project is to determine the performance of the catalytic process under conditions which enable an industrial implementation in energy storage concepts. In this contribution we report of the design of a demonstration plant and on first experiments concerning the kinetics within the system.

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