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CO2 Methanation in microstructured reactors - catalyst development and process design

: Neuberg, Stefan; Pennemann, Helmut; Shanmugam, Vetrivel; Thiermann, Raphael; Zapf, Ralf; Gac, Wojciech; Greluk, Magdalena; Zawadski, Witold; Kolb, Gunther


Chemical Engineering and Technology 42 (2019), Nr.10, S.2076-2084
ISSN: 0930-7516
ISSN: 1521-4125
International Conference on Micro Reaction Technology (IMRET) <15, 2018, Karlsruhe>
Bundesministerium für Ernährung und Landwirtschaft BMEL (Deutschland)
22400215; ICOCAD
Zeitschriftenaufsatz, Konferenzbeitrag
Fraunhofer IMM ()
catalyst; CO2; methanation; microreactor; sabatier reaction; sulfur tolerance

The sulfur tolerance of mono‐ and bimetallic ruthenium catalysts for CO2 hydrogenation was investigated in microchannel reactors. H2S was selected as a model compound. It was found that a Ru/CeO2 catalyst deactivates rapidly. Ni was a much better additive to improve the catalyst stability compared to Rh and serves as a sulfur trap. The influence of the support was evaluated showing that a SiO2‐supported catalyst has a higher stability and better selectivity compared to CeO2 and TiO2. A plant concept was developed comprising two‐step methanation with a first adiabatic reactor stage followed by a plate heat‐exchanger reactor with integrated cooling which allows more than 97 % CO2 conversion. A pilot plant will be put into operation in connection with a biogas plant and an electrolyser of 50 kW power consumption.