Model development for a SOFC button cell using H2S as fuel |
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| Affiliation: | 1. DST HySA Infrastructure Centre of Competence, Faculty of Engineering, South Africa;2. Focus Area, Chemical Resource Benificaition, Faculty of Natural Science, North-West University, Potchefstroom, South Africa;3. Institute of Chemical Process Engineering, University of Stuttgart, D-70199, Stuttgart, Germany;1. Department of Engineering Mechanics, Beijing University of Technology, Beijing 100124, China;2. Department of Civil and Architectural Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;1. Department of Cardiology, Gaia/Espinho Hospital Centre, Vila Nova de Gaia, Portugal;2. Department of Cardiothoracic Surgery, Gaia/Espinho Hospital Centre, Vila Nova de Gaia, Portugal;1. School of Chemistry & Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China;2. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China;3. Changchun University of Science and Technology Science Park, Changchun 130022, P.R. China;4. Guangdong College of Business and Technology, Zhaoqing 526020, P.R. China |
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| Abstract: | In this paper we present a hierarchy of models built to describe the overall performance of a single H2S fuelled button cell solid oxide fuel cell (SOFC). The cell, used in the experimental studies of Liu et al. [M. Liu, G. Wei, J. Luo, A.R. Sanger, K.T. Chuang, Use of metal sulfides as anode catalysts in H2S–air SOFCs, J. Electrochem. Soc. 150 (2003) 1025–1029], was a planar cell with a circular disc-like electrode assembly and the fuel and air flowing through a concentric cylindrical tube assembly. The goal is to model the electrochemical reaction coupled with mass transfer, fluid flow and current/voltage distribution in an yttria stabilized zirconia electrolyte fuel cell assembly operated between 750 and 850 °C. The models built range in complexity from an algebraic system of equations that calculates the activation, concentration and ohmic losses, to a two-dimensional finite element model that solves all the physics in the SOFC simultaneously. Kinetic parameters in these (progressively more comprehensive) models have been estimated and compared, leading hopefully to more accurate estimates for these parameters. |
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