An investigation of fuel composition and flow-rate effects in a H 2S fuelled sofc: Experiments and thermodynamic analysis

Dayadeep S. Monder*, Vitaly Vorontsov, Jingli Luo, Karl T. Chuang, K. Nandakumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Hydrogen sulphide (H 2S)-fuelled solid oxide fuel cells (SOFCs) can potentially generate useful electrical energy while disposing of H 2S, a toxic by-product of the fossil fuel industry, on site. Experimental results from H 2S fuelled SOFCs exhibit characteristics, for example, an unusual dependence of cell performance on fuel composition and flow-rate, which are poorly explained in the literature. In this work we: (a) present results for experiments where the composition and flow-rates were varied for both the fuel and oxidant streams to analyse their effect on fuel cell performance, and (b) develop and use a thermodynamic analysis to help understand these experimental results. Through this work, we shed further light on two basic questions unanswered so far, (1) Why does the flow-rate of the fuel affect the open circuit potential of the fuel cell? (2) Which of the chemical species present in the fuel is oxidised on the anode? Our experiments and analysis suggest that H 2S, and not H 2 produced from H 2S dissociation, is preferentially electro-oxidised on the anode in our experiments.

Original languageEnglish
Pages (from-to)1033-1042
Number of pages10
JournalCanadian Journal of Chemical Engineering
Volume90
Issue number4
DOIs
StatePublished - Aug 2012
Externally publishedYes

Keywords

  • Fuel dissociation
  • Open circuit voltage
  • Solid oxide fuel cells

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