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Theoretical study on pressurized operation of solid oxide electrolysis cells

Henke, Moritz and Willich, Caroline and Kallo, Josef and Friedrich, K. Andreas (2014) Theoretical study on pressurized operation of solid oxide electrolysis cells. International Journal of Hydrogen Energy, 39, pp. 12434-12439. Elsevier. DOI: [10.1016/j.ijhydene.2014.05.185] ISSN 0360-3199

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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 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.

Item URL in elib:https://elib.dlr.de/92308/
Document Type:Article
Title:Theoretical study on pressurized operation of solid oxide electrolysis cells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Henke, Moritzmoritz.henke (at) dlr.deUNSPECIFIED
Willich, Carolinecaroline.willich (at) dlr.deUNSPECIFIED
Kallo, Josefjosef.kallo (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:July 2014
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:39
DOI :[10.1016/j.ijhydene.2014.05.185]
Page Range:pp. 12434-12439
Publisher:Elsevier
ISSN:0360-3199
Status:Published
Keywords:Solid oxide electrolysis cell Pressure Power density Efficiency SOEC Pressurized SOEC
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:26 Nov 2014 10:04
Last Modified:26 Nov 2014 10:04

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