Membrane-based catalytic partial oxidation of ethanol coupled with steam reforming for solid oxide fuel cells
2021
Li, Chaoqun | He, Zhenyu | Ban, Xiaokuan | Li, Naizhi | Chen, Chusheng | Zhan, Zhongliang
The present study was aimed at developing a new ethanol reforming process by integrating oxygen separation, partial oxidation and steam reforming in a membrane reactor. The reactor was constructed with the composite membrane of yttria-stabilized zirconia-La₀.₈Sr₀.₂Cr₀.₅Fe₀.₅O₃₋δ of effective area 5 cm² and Ni–Ru/Al₂O₃ catalyst of loading 5 wt%. It attained ethanol conversion 99.9%, H₂ selectivity 90.8% and CO selectivity 74.6% with ethanol feed rate 30 mL min⁻¹and steam 54 mL min⁻¹ at 800 °C. Running on the as-produced syngas fuel, a solid oxide fuel cell (SOFC) demonstrated a maximum power density of 999 mW cm⁻² at 750 °C, which was just slightly lower than on pure hydrogen fuel. Compared with the conventional fixed bed reactor, the membrane reactor explored in the present study showed clear advantages in terms of heat management and syngas concentration, promising for us as ethanol pre-reformer in SOFC.
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