The impact of sulfur on the performance of a solid oxide fuel cell (SOFC) system operated with hydrocarboneous fuel gas |
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| Authors: | Florian P. Nagel Tilman J. Schildhauer Josef Sfeir Alexander Schuler Serge M.A. Biollaz |
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| Affiliation: | 1. Paul Scherrer Institut, Laboratory for Energy and Materials Cycles, Department General Energy, CH-5232 Villigen PSI, Switzerland;2. Hexis AG, Hegifeldstrasse 30, CH-8404 Winterthur, Switzerland |
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| Abstract: | The impact of thiophene in the fuel gas of a commercial solid oxide fuel cell (SOFC) system is investigated for concentrations up to 400 ppmV. Based on the measured voltage–current curves, an empiric correlation for the estimation of the expectable power output of the investigated SOFC system when operated with sulfur containing fuel gases is derived. An interrelation between the open circuit voltage (OCV) and the sulfur concentration of the investigated hydrocarboneous fuel gas is presented and discussed based on corresponding model simulations. The reduction of the steam reforming (STR) activity of the anode cermet material and of the catalytic partial oxidation catalyst used for the fuel gas processing in the investigated SOFC system are found important factors regarding the power output reduction induced by sulfur traces in the fuel gas of SOFCs. |
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| Keywords: | CPO, catalytic partial oxidation DC, direct current OCV, open circuit voltage SOFC, solid oxide fuel cell STR, steam reforming TPB, triple phase boundary WGS, water gas shift YSZ, yttria stabilized zirconia |
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