Thermal stress analysis of sulfur deactivated solid oxide fuel cells
(2018) In Journal of Power Sources 379. p.134-143- Abstract
Hydrogen sulfide in fuels can deactivate catalyst for solid oxide fuel cells, which has become one of the most critical challenges to stability. The reactions between sulfur and catalyst will cause phase changes, leading to increase in cell polarization and mechanical mismatch. A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is thus used to investigate the polarization, temperature and thermal stress in a sulfur deactivated SOFC by coupling equations for gas-phase species, heat, momentum, ion and electron transport. The results indicate that sulfur in fuels can strongly affect the cell polarization and thermal stresses, which shows a sharp decrease in the vicinity of electrolyte... (More)
Hydrogen sulfide in fuels can deactivate catalyst for solid oxide fuel cells, which has become one of the most critical challenges to stability. The reactions between sulfur and catalyst will cause phase changes, leading to increase in cell polarization and mechanical mismatch. A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is thus used to investigate the polarization, temperature and thermal stress in a sulfur deactivated SOFC by coupling equations for gas-phase species, heat, momentum, ion and electron transport. The results indicate that sulfur in fuels can strongly affect the cell polarization and thermal stresses, which shows a sharp decrease in the vicinity of electrolyte when 10% nickel in the functional layer is poisoned, but they remain almost unchanged even when the poisoned Ni content was increased to 90%. This investigation is helpful to deeply understand the sulfur poisoning effects and also benefit the material design and optimization of electrode structure to enhance cell performance and lifetimes in various hydrocarbon fuels containing impurities.
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- author
- Zeng, Shumao ; Parbey, Joseph ; Yu, Guangsen ; Xu, Min ; Li, Tingshuai and Andersson, Martin LU
- organization
- publishing date
- 2018-03-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Hydrogen sulfide, Polarization, Solid oxide fuel cell, Thermal stress
- in
- Journal of Power Sources
- volume
- 379
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85041389725
- ISSN
- 0378-7753
- DOI
- 10.1016/j.jpowsour.2018.01.011
- language
- English
- LU publication?
- yes
- id
- ddd5b200-3c91-4cc6-920b-e7598b570363
- date added to LUP
- 2018-02-15 12:25:13
- date last changed
- 2022-04-17 18:46:52
@article{ddd5b200-3c91-4cc6-920b-e7598b570363,
abstract = {{<p>Hydrogen sulfide in fuels can deactivate catalyst for solid oxide fuel cells, which has become one of the most critical challenges to stability. The reactions between sulfur and catalyst will cause phase changes, leading to increase in cell polarization and mechanical mismatch. A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is thus used to investigate the polarization, temperature and thermal stress in a sulfur deactivated SOFC by coupling equations for gas-phase species, heat, momentum, ion and electron transport. The results indicate that sulfur in fuels can strongly affect the cell polarization and thermal stresses, which shows a sharp decrease in the vicinity of electrolyte when 10% nickel in the functional layer is poisoned, but they remain almost unchanged even when the poisoned Ni content was increased to 90%. This investigation is helpful to deeply understand the sulfur poisoning effects and also benefit the material design and optimization of electrode structure to enhance cell performance and lifetimes in various hydrocarbon fuels containing impurities.</p>}},
author = {{Zeng, Shumao and Parbey, Joseph and Yu, Guangsen and Xu, Min and Li, Tingshuai and Andersson, Martin}},
issn = {{0378-7753}},
keywords = {{Hydrogen sulfide; Polarization; Solid oxide fuel cell; Thermal stress}},
language = {{eng}},
month = {{03}},
pages = {{134--143}},
publisher = {{Elsevier}},
series = {{Journal of Power Sources}},
title = {{Thermal stress analysis of sulfur deactivated solid oxide fuel cells}},
url = {{http://dx.doi.org/10.1016/j.jpowsour.2018.01.011}},
doi = {{10.1016/j.jpowsour.2018.01.011}},
volume = {{379}},
year = {{2018}},
}