File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Mathematical modeling of ammonia-fed solid oxide fuel cells with different electrolytes

TitleMathematical modeling of ammonia-fed solid oxide fuel cells with different electrolytes
Authors
KeywordsAmmonia fuel
Electrochemical modeling
Multi-component mass transfer
Oxygen-ion conductors
Porous media
Proton-conducting ceramics
Solid oxide fuel cell (SOFC)
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydene
Citation
International Journal Of Hydrogen Energy, 2008, v. 33 n. 20, p. 5765-5772 How to Cite?
AbstractAn electrochemical model was developed to study the ammonia (NH3)-fed solid oxide fuel cells with proton-conducting electrolyte (SOFC-H) and oxygen ion-conducting electrolyte (SOFC-O). Different from previous thermodynamic analysis, the present study reveals that the actual performance of the NH3-fed SOFC-H is considerably lower than the SOFC-O, mainly due to higher ohmic overpotential of the SOFC-H electrolyte. More analyses have been performed to study the separate overpotentials of the NH3-fed SOFC-H and SOFC-O. Compared with the NH3-fed SOFC-H, the SOFC-O has higher anode concentration overpotential and lower cathode concentration overpotential. The effects of temperature and electrode porosity on concentration overpotentials have also been studied in order to identify possible methods for improvement of SOFC performance. This study reveals that the use of different electrolytes not only causes different ion conduction characteristics at the electrolyte, but also significantly influences the concentration overpotentials at the electrodes. The model developed in this article can be extended to 2D and 3D models for further design optimization. © 2008 International Association for Hydrogen Energy.
Persistent Identifierhttp://hdl.handle.net/10722/59058
ISSN
2015 Impact Factor: 3.205
2015 SCImago Journal Rankings: 1.330
ISI Accession Number ID
Funding AgencyGrant Number
CRCG of the University of Hong Kong
Funding Information:

The authors thank the financial support by the CRCG of the University of Hong Kong. They also thank Prof. G.Y. Meng (University of Science and Technology of China), Prof. S.H. Chan (Nanyang Technological University, Singapore) and Prof. A.K. Demin (institute of High Temperature Electrochemistry, Russia) for their discussions and suggestions in SOFC research.

References

 

DC FieldValueLanguage
dc.contributor.authorNi, Men_HK
dc.contributor.authorLeung, DYCen_HK
dc.contributor.authorLeung, MKHen_HK
dc.date.accessioned2010-05-31T03:42:10Z-
dc.date.available2010-05-31T03:42:10Z-
dc.date.issued2008en_HK
dc.identifier.citationInternational Journal Of Hydrogen Energy, 2008, v. 33 n. 20, p. 5765-5772en_HK
dc.identifier.issn0360-3199en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59058-
dc.description.abstractAn electrochemical model was developed to study the ammonia (NH3)-fed solid oxide fuel cells with proton-conducting electrolyte (SOFC-H) and oxygen ion-conducting electrolyte (SOFC-O). Different from previous thermodynamic analysis, the present study reveals that the actual performance of the NH3-fed SOFC-H is considerably lower than the SOFC-O, mainly due to higher ohmic overpotential of the SOFC-H electrolyte. More analyses have been performed to study the separate overpotentials of the NH3-fed SOFC-H and SOFC-O. Compared with the NH3-fed SOFC-H, the SOFC-O has higher anode concentration overpotential and lower cathode concentration overpotential. The effects of temperature and electrode porosity on concentration overpotentials have also been studied in order to identify possible methods for improvement of SOFC performance. This study reveals that the use of different electrolytes not only causes different ion conduction characteristics at the electrolyte, but also significantly influences the concentration overpotentials at the electrodes. The model developed in this article can be extended to 2D and 3D models for further design optimization. © 2008 International Association for Hydrogen Energy.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydeneen_HK
dc.relation.ispartofInternational Journal of Hydrogen Energyen_HK
dc.subjectAmmonia fuelen_HK
dc.subjectElectrochemical modelingen_HK
dc.subjectMulti-component mass transferen_HK
dc.subjectOxygen-ion conductorsen_HK
dc.subjectPorous mediaen_HK
dc.subjectProton-conducting ceramicsen_HK
dc.subjectSolid oxide fuel cell (SOFC)en_HK
dc.titleMathematical modeling of ammonia-fed solid oxide fuel cells with different electrolytesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0360-3199&volume=33&spage=5765&epage=5772&date=2008&atitle=Mathematical+modeling+of+ammonia-fed+solid+oxide+fuel+cells+with+different+electrolytesen_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hken_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijhydene.2008.07.021en_HK
dc.identifier.scopuseid_2-s2.0-53449092025en_HK
dc.identifier.hkuros153391en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-53449092025&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume33en_HK
dc.identifier.issue20en_HK
dc.identifier.spage5765en_HK
dc.identifier.epage5772en_HK
dc.identifier.isiWOS:000261009000058-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNi, M=9268339800en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats