Theoretical Study on Pressurized Operation of Solid Oxide Electrolysis Cells
| Autor: | Caroline Willich, Moritz Henke, K. Andreas Friedrich, Josef Kallo |
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| Rok vydání: | 2014 |
| Předmět: |
Solid oxide electrolysis cell Pressure Power density Efficiency SOEC Pressurized SOEC
Electrolysis Renewable Energy Sustainability and the Environment Chemistry Electrolytic cell High-pressure electrolysis Analytical chemistry Oxide Energy Engineering and Power Technology Condensed Matter Physics Electrochemistry law.invention chemistry.chemical_compound Fuel Technology Chemical engineering High-temperature electrolysis law Solid oxide fuel cell PSOEC Polymer electrolyte membrane electrolysis |
| Popis: | In this paper the influence of pressure on the performance of solid oxide electrolysis cells is theoretically analyzed in a pressure range between 0.05 and 2 MPa. A previously validated electrochemical model of a solid oxide fuel cell stack is used to predict electrolysis behavior. The effect of pressure on thermodynamics, kinetics and gas diffusion is discussed. It is shown that thermodynamics are negatively influenced by an increase in pressure whereas kinetics and gas transport are improved. Overall pressure effects are therefore only small. At low current density the electrolysis cell shows better performance at low pressure whereas performance improves with pressure at high current densities. |
| Databáze: | OpenAIRE |
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