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The Liquid Antimony Anode Solid Oxide Fuel Cell (LAA-SOFC) is promising for directly converting hydrocarbon fuels. This study decouples the fuel chemical reactions within the LAA, separately investigating the pyrolysis and oxidation reaction characteristics of methanol in liquid Sb, Sb2O3 and Sb/Sb2O3 melts with varying proportions, to analyze the conversion mechanism of methanol in the LAA. Results indicate that methanol sequentially reacts in liquid Sb and Sb2O3 layers: In liquid Sb, methanol undergoes pyrolysis to generate H2, CO, minor CH4 and C2 hydrocarbons. These products then ascend to the Sb2O3 layer driven by density differences. Within Sb2O3, over 90% of H2 is oxidized to H2O, while CO and small-molecule hydrocarbons are only partially oxidized due to kinetic limitations. Both pyrolysis and oxidation extents increase with temperature, reaching 94.07% and 70.27% respectively at 900 °C. The overall methanol conversion is primarily constrained by the oxidation kinetics of pyrolysis products. Finally, based on exhaust gas composition, a method coupling LAA-SOFC with conventional SOFC is proposed for combined gas-electricity production, enhancing overall power generation efficiency.

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Methanol Partial Oxidation with Power Generation in Liquid Antimony Anode Solid Oxide Fuel Cells

  • 会议论文

  • 发表日期：

    2026年

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  • Yuting Li,
  • Yidong Jiang,
  • Xin Gu,
  • Shuang Li,
  • Yixiang Shi

摘要

The Liquid Antimony Anode Solid Oxide Fuel Cell (LAA-SOFC) is promising for directly converting hydrocarbon fuels. This study decouples the fuel chemical reactions within the LAA, separately investigating the pyrolysis and oxidation reaction characteristics of methanol in liquid Sb, Sb2O3 and Sb/Sb2O3 melts with varying proportions, to analyze the conversion mechanism of methanol in the LAA. Results indicate that methanol sequentially reacts in liquid Sb and Sb2O3 layers: In liquid Sb, methanol undergoes pyrolysis to generate H2, CO, minor CH4 and C2 hydrocarbons. These products then ascend to the Sb2O3 layer driven by density differences. Within Sb2O3, over 90% of H2 is oxidized to H2O, while CO and small-molecule hydrocarbons are only partially oxidized due to kinetic limitations. Both pyrolysis and oxidation extents increase with temperature, reaching 94.07% and 70.27% respectively at 900 °C. The overall methanol conversion is primarily constrained by the oxidation kinetics of pyrolysis products. Finally, based on exhaust gas composition, a method coupling LAA-SOFC with conventional SOFC is proposed for combined gas-electricity production, enhancing overall power generation efficiency.