S. Thiemann-Handler

Robert-Bosch Krankenhaus, Stuttgart, Baden-Württemberg, Germany

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Publications (2)8.12 Total impact

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    ABSTRACT: A novel dismantlable monolithic-type electrochemically promoted catalytic reactor and "smart" sensor-catalytic reactor unit has been constructed and tested for hydrocarbon oxidation and NO reduction by C2H4 in the presence of O-2. In this novel reactor, thin (similar to 40 nm) porous catalyst films made of two different materials are sputter-deposited on opposing surfaces of thin (0.25 mm) parallel solid electrolyte plates supported in the grooves of a ceramic monolithic holder and serve as sensor or electropromoted catalyst elements. The catalyst dispersion was higher than 10%. A 22 flat plate reactor operated with apparent Faradaic efficiency up to 100, at near complete reactants conversion, at gas flow rates up to 30 l/min. The novel design has only two external electrical connections and thus significantly facilitates the practical utilization of electrochemical promotion of catalysis. (c) 2006 Elsevier B.V. All rights reserved.
    Solid State Ionics 10/2006; 177:2199-2202. DOI:10.1016/j.ssi.2006.03.027 · 2.11 Impact Factor
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    ABSTRACT: A novel dismantlable monolithic-type electrochemically promoted catalytic reactor and “smart” sensor-catalytic reactor unit has been constructed and tested for hydrocarbon oxidation and NO reduction by C2H4 in presence of O2. In this novel reactor, thin (∼20–40 nm) porous catalyst films made of two different materials are sputter-deposited on opposing surfaces of thin (0.25 mm) parallel solid electrolyte plates supported in the grooves of a ceramic monolithic holder and serve as sensor or electropromoted catalyst elements. Using Rh/YSZ/Pt-type catalyst elements, the 22-plate reactor operated with apparent Faradaic efficiency exceeding 25 achieving near complete fuel and NO conversion at 300 °C in presence of up to 1.1% O2 in the feed at gas flow rates exceeding 1.3 l/min. The metal catalyst dispersion was of the order of at least 15%. The novel reactor design requires only two external electrical connections and permits easy practical utilization of the electrochemical promotion of catalysis.
    Applied Catalysis B Environmental 09/2004; 52(3-52):181-196. DOI:10.1016/j.apcatb.2004.04.007 · 6.01 Impact Factor