Parametric study on direct ethanol fuel cell (DEFC) performance and fuel crossover

A. M.I.N. Azam, S. H. Lee, Mohd Shahbudin Mastar @ Masdar, A. M. Zainoodin, S. K. Kamarudin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A parametric study was carried out to investigate the effect of fuel concentration (0.5 M–3.0 M), operating temperature (ambient temperature to 85 °C), flow rate of ethanol (0.5–5.0 mL min−1) and air (100–600 mL min−1) on the direct ethanol fuel cell (DEFC) performance. The operations were conducted in three operational modes, namely, passive, semi passive, and active modes, and power generation were measured. Ethanol crossover was indicated by the carbon dioxide (CO2) concentration present at the cathode outlet and measured by using a CO2 analyzer. Results indicated that DEFC performance increased with the increase of ethanol concentration, and ethanol and oxidant flow rate increased with temperature until DEFC reaches the optimum conditions, i.e., concentration and flow rate. Meanwhile, the DEFC performance significantly and proportionally increased with operation temperature and reached values of up to 8.70 mW cm−2 and 85 °C at stable conditions. Furthermore, fuel crossover, that is, ethanol flux, increased in proportion to the ethanol concentration, i.e., 3.71 × 10−4 g m−2 s−1 and 8.79 × 10−4 g m−2 s−1 for 0.5 M and 3.0 M ethanol concentration, respectively. At different modes of operation, the active DEFC system exhibited the highest performance, followed by the semi passive and passive DEFC system. These results indicated that optimizing ethanol, oxidant flow rate and temperature would enhance the mass transport in anodes and cathodes, and hence improve the electrochemical reactions and DEFC performance.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 1 Jan 2018

Fingerprint

Direct ethanol fuel cells (DEFC)
fuel cells
crossovers
Ethanol
ethyl alcohol
Flow rate
Oxidants
flow velocity
Cathodes
Temperature
Power generation
Carbon dioxide
Anodes
cathodes
carbon dioxide concentration
Mass transfer
Fluxes

Keywords

  • DEFC
  • Fuel crossover
  • Mass transport
  • Parametric
  • Performance

ASJC Scopus subject areas

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

Cite this

Parametric study on direct ethanol fuel cell (DEFC) performance and fuel crossover. / Azam, A. M.I.N.; Lee, S. H.; Mastar @ Masdar, Mohd Shahbudin; Zainoodin, A. M.; Kamarudin, S. K.

In: International Journal of Hydrogen Energy, 01.01.2018.

Research output: Contribution to journalArticle

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