Modeling of direct carbon solid oxide fuel cells with H2O and CO2as gasification agents

Haoran Xu, Bin Chen, Houcheng Zhang, Qiong Sun, Guangming Yang, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)

Abstract

The simulation results are compared with experimental data and good agreement is obtained. The performance of DC-SOFCs with two agents is compared at different operating potential, temperature and anode inlet gas flow rate. It is found that the H2O assisted DC-SOFC performs significantly better than the CO2-assisted DC-SOFC, indicating the suitability of H2O for DC-SOFCs. It is also found that a higher temperature could greatly improve the performance of both kinds of DC-SOFCs. At a temperature of 1000 K and operating voltage of 0.5 V, the current density from the CO2-assisted DC-SOFC is close to 0 while it is still above 1000 A m−2from the H2O-assisted DC-SOFC, indicating the possibility of operating the H2O assisted DC-SOFC at reduced temperature. It is found that the anode gas flow rate does not significantly affect the performance of DC-SOFC. To further improve the performance of H2O assisted DC-SOFCs, developing suitable catalysts for enhancing carbon gasification kinetics could be a good strategy. The results of this study form a solid foundation to understand H2O assisted DC-SOFCs.
Original languageEnglish
Pages (from-to)15641-15651
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number23
DOIs
Publication statusPublished - 8 Jun 2017

Keywords

  • Mathematical modeling
  • Solid oxide fuel cell (SOFC)
  • Steam gasification of carbon

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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