Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks

K. P. Recknagle, D. T. Jarboe, K. I. Johnson, V. Korolev, M. A. Khaleel, P. Singh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Providing adequate and efficient cooling schemes for solid-oxide-fuel-cell (SOFC) stacks continues to be a challenge coincident with the development of larger, more powerful stacks. The endothermic steam-methane reformation reaction can provide cooling and improved system efficiency when performed directly on the electrochemically active anode. Rapid kinetics of the endothermic reaction typically causes a localized temperature depression on the anode near the fuel inlet. It is desirable to extend the endothermic effect over more of the cell area and mitigate the associated differences in temperature on the cell to alleviate subsequent thermal stresses. In this study, modeling tools validated for the prediction of fuel use, on-cell methane reforming, and the distribution of temperature within SOFC stacks are employed to provide direction for modifying the catalytic activity of anode materials to control the methane conversion rate. Improvements in thermal management that can be achieved through on-cell reforming is predicted and discussed. Two operating scenarios are considered, one in which the methane fuel is fully pre-reformed and another in which a substantial percentage of the methane is reformed on-cell. For the latter, a range of catalytic activity is considered, and the predicted thermal effects on the cell are presented. Simulations of the cell electrochemical and thermal performance with and without on-cell reforming, including structural analyses, show a substantial decrease in thermal stresses for an on-cell reforming case with slowed methane conversion rate.

Original languageEnglish
Title of host publicationCeramic Engineering and Science Proceedings
Pages409-418
Number of pages10
Volume27
Edition4
Publication statusPublished - 1 Dec 2006
Externally publishedYes
EventAdvances in Solid Oxide Fuel Cells II - 30th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: 22 Jan 200627 Jan 2006

Other

OtherAdvances in Solid Oxide Fuel Cells II - 30th International Conference on Advanced Ceramics and Composites
CountryUnited States
CityCocoa Beach, FL
Period22/1/0627/1/06

Fingerprint

Methane
Electrochemistry
Solid oxide fuel cells (SOFC)
Reforming reactions
Anodes
Thermal stress
Catalyst activity
Cooling
Electrochemical cells
Steam
Temperature control
Thermal effects
Temperature
Kinetics

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Recknagle, K. P., Jarboe, D. T., Johnson, K. I., Korolev, V., Khaleel, M. A., & Singh, P. (2006). Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks. In Ceramic Engineering and Science Proceedings (4 ed., Vol. 27, pp. 409-418)

Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks. / Recknagle, K. P.; Jarboe, D. T.; Johnson, K. I.; Korolev, V.; Khaleel, M. A.; Singh, P.

Ceramic Engineering and Science Proceedings. Vol. 27 4. ed. 2006. p. 409-418.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Recknagle, KP, Jarboe, DT, Johnson, KI, Korolev, V, Khaleel, MA & Singh, P 2006, Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks. in Ceramic Engineering and Science Proceedings. 4 edn, vol. 27, pp. 409-418, Advances in Solid Oxide Fuel Cells II - 30th International Conference on Advanced Ceramics and Composites, Cocoa Beach, FL, United States, 22/1/06.
Recknagle KP, Jarboe DT, Johnson KI, Korolev V, Khaleel MA, Singh P. Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks. In Ceramic Engineering and Science Proceedings. 4 ed. Vol. 27. 2006. p. 409-418
Recknagle, K. P. ; Jarboe, D. T. ; Johnson, K. I. ; Korolev, V. ; Khaleel, M. A. ; Singh, P. / Electrochemistry and on-cell reformation modeling for solid oxide fuel cell stacks. Ceramic Engineering and Science Proceedings. Vol. 27 4. ed. 2006. pp. 409-418
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