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High temperature electrolyzer based on solid oxide co-ionic electrolyte: A theoretical model
Authors:Anatoly Demin  Elena Gorbova  Panagiotis Tsiakaras
Affiliation:1. Institute of High Temperature Electrochemistry, 22 S. Kovalevskoy, 620219 Yekaterinburg, Russia;2. School of Engineering, Department of Mechanical Engineering, University of Thessaly, Pedion Areos, 383 34 Volos, Greece
Abstract:In the present work a theoretical model of a solid oxide electrolyzer based on an electrolyte having both oxygen ion and proton conductivity is considered. The main parameters of the electrolytic process and an electrolyzer (distribution of gas components, electromotive forces and current densities along the electrolyzer channel, average values of electromotive forces and current densities) were calculated depending on a proton transport number and mode of the reactants’ feeding (co- and counter-flow). The performed analysis demonstrates considerable influence of the mode of feeding on all parameters of the electrolyzer: operation under the counter-flow mode is preferable as regards the specific characteristics and uniformity of their distribution along the electrolyzer. It is shown that the electrolyser's specific characteristics increase with the increase of the proton transport number.
Keywords:SOE, solid oxide electrolyzer   SOFC, solid oxide fuel cell
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