Ceria-Co-Cu-based SOFC anode for direct utilisation of methane or ethanol as fuels

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • Univ Fed Rio de Janeiro
  • Korean Institute of Energy Research (KIER)
  • Universidade Federal Do Rio de Janeiro

Abstract

Nickel-free solid oxide fuel cell anodes are an object of study for applications that aim at utilising primary carbonaceous fuels to generate power. In this study, a ceria-Co-Cu anode is produced and tested with hydrogen, methane and ethanol fuels at various temperatures.
The produced catalysts were characterised by X-ray analysis and H2 temperature-programmed reduction (TPR). Catalytic tests were performed and compared with the material under electrochemical operation. The cells were electrochemically characterised by recording i-V plots. The samples were assessed post-test for eventual carbon deposits by Raman spectroscopy investigations and temperature-programmed oxidation (TPO) analysis.
The cells were able to operate with hydrogen, methane as well as ethanol, directly fed to the anode, with maximum power densities ranging from 400 to 540 mW.cm-2, depending on the fuel stream utilised. The cells also kept their integrity demonstrating coking resistance for over 24 hours of continuous operation. Important discussions and conclusions are drawn about carbon formation and the role of each compound in the anode composition. The bimetallic cell (ceria-Co-Cu) is herein compared to monometallic ones (ceria-Co and ceria-Cu) that served as baselines. The advantages of the bimetallic composition are listed and evaluated throughout the discussions.

Details

Original languageEnglish
Article numberHE-D-19-00909R1
JournalInternational Journal of Hydrogen Energy
Publication statusPublished - 2 May 2019
EventWorld Hydrogen Energy Conference - Rio de Janeiro, Brazil
Duration: 17 Jun 201822 Jun 2018
https://whec2018.com/

Keywords

  • SOFC, Ethanol, carbon deposition, solid oxide fuel cells, nickel-free anode, direct methane, ethanol utilisation, primary fuels

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