Poisoning effects of sulfur compounds on the performances of solid oxide fuel cells are non-trivial. However, the synergistic effects of gas diffusion, adsorption, desorption and reaction in anodes are typically neglected. In this work, an analytical model is derived to quantitatively evaluate the poisoning effects of H₂S. The results show that sulfur poisoning correlates closely with inefficient gas diffusion for small anode pore size, small porosity/tortuosity, and low working temperatures. As compared with concentration polarization, H₂S-diffusion-induced activation polarization in thin anodes with a large is detrimental, especially for low-temperature operations with a high H₂S concentration and a low current density. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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硫中毒和气体扩散对固体氧化物燃料电池阳极极化损失的协同效应

硫化合物对固体氧化物燃料电池性能的中毒作用是微不足道的。然而，通常忽略了阳极中气体扩散，吸附，解吸和反应的协同作用。在这项工作中，导出了一个分析模型来定量评估H ₂ S的中毒效果。结果表明，对于较小的阳极孔径，较小的孔隙率/曲折度和较低的工作温度，硫中毒与气体扩散效率低下密切相关。与浓差极化相比，在较大的薄阳极中，H ₂ S扩散引起的活化极化 是有害的，特别是对于高H _2的低温操作S浓度低，电流密度低。©2017美国化学工程师学会AIChE J，2017