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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.jpowsour.2012.11.094Journal of Power Sources, 229, pp. 48-57, 2012-11-30 Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte Yoo, Yeong; Lim, Nguon . The open circuit voltages were around 1.12-1.13 V at 600 C indicating negligible gas leakage or mixed conduction through the electrolyte. The maximum power density of 493 mW cm -2 was obtained at 600 C and 0.7 V under air as the oxidant gas and humid 75% H 2 in N 2 (2.76% H 2 O) as the fuel gas at a gas flow rate of 100 ml min -1. The area specific resistance of an anode supported button cell of BSCF-BCZY // BCZY // NiO-BCZY in fuel cell mode was about 0.46 cm 2 and in the electrolysis mode was 0.26 cm 2 at 600 °C, indicating efficient reversible SOFCs. The single cell performance was stable for over 600 h at 600 C under humid 75% H 2 in N 2 (2.76% H 2 O) as the fuel gas and air as the oxidant gas. The stability of BCZY electrolyte in water-containing atmospheres was investigated by exposing sintered BCZY pellets to humid air (2.76% H 2 O) at 200 C for 24 h or soaking them in boiling water for 3 h.

The performance of three solid oxide fuel cell (SOFC) systems, fuelled by biogas produced through anaerobic digestion (AD) process, for heat and electricity generation in wastewater treatment plants (WWTPs) is studied. Each system has a different fuel processing method to prevent carbon deposition over the anode catalyst under biogas fuelling. Anode gas recirculation (AGR), steam reforming (SR), and partial oxidation (POX) are the methods employed in systems I-III, respectively. A planar SOFC stack used in these systems is based on the anode-supported cells with Ni-YSZ anode, YSZ electrolyte and YSZ-LSM cathode, operated at 800• C. A computer code has been developed for the simulation of the planar SOFC in cell, stack and system levels and applied for the performance prediction of the SOFC systems. The key operational parameters affecting the performance of the SOFC systems are identified. The effect of these parameters on the electrical and CHP efficiencies, the generated electricity and heat, the total exergy destruction, and the number of cells in SOFC stack of the systems are studied. The results show that among the SOFC systems investigated in this study, the AGR and SR fuel processor-based systems with electrical efficiency of 45.1% and 43%, respectively, are suitable to be applied in WWTPs. If the entire biogas produced in a WWTP is used in the AGR or SR fuel processor-based SOFC system, the electricity and heat required to operate the WWTP can be completely self-supplied and the extra electricity generated can be sold to the electrical grid.Crown

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