Comparison of the performances of single cell solid oxide fuel cell stacks with Ni/8YSZ and Ni/10CGO anodes with H2S containing fuel
Comparison of the performances of single cell solid oxide fuel cell stacks with Ni/8YSZ and Ni/10CGO anodes with H2S containing fuel
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采用 Ni/8YSZ 和 Ni/10CGO 阳极的单电池固体氧化物燃料电池堆与含 H2S 燃料的性能比较
DOI：
10.1016/j.jpowsour.2012.06.020
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发表时间：
2012
影响因子：
9.2
通讯作者：
S. Bredikhin
中科院分区：
文献类型：
--
作者：
Sena Kavurucu Schubert;M. Kusnezoff;A. Michaelis;S. Bredikhin
在850 °C下比较了Ni/8 YSZ（8mol%Y2O3掺杂ZrO 2）和Ni/10 CGO（10mol%Gd2O3掺杂CeO 2）阳极的单电池固体氧化物燃料电池（SOFC）堆在H2/H2O/N2燃料混合物中的硫中毒（1-50 ppm）性能。讨论了Ni/8 YSZ和Ni/10 CGO阳极在三相界面处的硫中毒和再生机理。考察了H2S污染周期、H2S浓度、电流密度、H2O浓度和污染时间等参数对反应的影响。提出了阳极硫中毒的机理。结果表明，从理论上讲，它是可以计算的镍表面积可用于阳极中的硫吸附使用Ni/8 YSZ阳极的H2S中毒行为。考虑到以往研究中考虑的阳极中H2的不同氧化机理，提出了Ni/8 YSZ和Ni/10 CGO阳极的硫中毒机理。Ni/10 CGO的高抗硫性与其高的混合离子电子电导率以及其吸附H2的能力有关。由于这些性质，CGO可以继续电化学反应，即使镍被硫覆盖。
The performances of single cell solid oxide fuel cell (SOFC) stacks with Ni/8YSZ (8 mol% Y2O3doped ZrO2) and Ni/10CGO (10 mol% Gd2O3doped CeO2) anodes were compared with respect to sulfur poisoning (1–50 ppm) with H2/H2O/N2fuel mixture at 850 °C. The mechanisms of the sulfur poisoning and regeneration of Ni/8YSZ and Ni/10CGO anodes at the triple phase boundaries are discussed. The effects of various parameters as H2S contamination cycles, H2S concentration, current density, H2O concentration and contamination durations were examined. A mechanism for the progress of the sulfur poisoning in the anode is proposed. It is shown that theoretically it is possible to calculate the nickel surface area accessible for the sulfur adsorption in the anode using H2S poisoning behavior for Ni/8YSZ anodes. The sulfur poisoning mechanisms of Ni/8YSZ and of Ni/10CGO anodes are proposed by taking into account the different oxidation mechanisms of H2in the anodes considered in previous studies. The higher sulfur resistance of Ni/10CGO is explained with its high mixed ionic electronic conductivity as well as its ability to adsorb H2. Due to these properties CGO can continue electrochemical reactions even when nickel is covered with sulfur.