| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7718134 | International Journal of Hydrogen Energy | 2014 | 6 Pages |
Abstract
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 2Â 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Moritz Henke, Caroline Willich, Josef Kallo, K. Andreas Friedrich,