Chlorine contaminants poisoning of solid oxide fuel cells

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• 作者：Ting Shuai Li (1)
  Cheng Xu (1)
  Tao Chen (1)
  He Miao (1)
  Wei Guo Wang (1) wgwang@nimte.ac.cn
• 关键词：Solid oxide fuel cells – ; Chlorine – ; Degradation – ; Recover – ; Microstructure
• 刊名：Journal of Solid State Electrochemistry
• 出版时间：June 2011
• 出版年：2011
• 期刊代码：79_1432-8488
• 类别：ch
• 卷：15
• 期：6
• 页码：1077-1085
• 数据来源：sp

摘要

Investigation has been conducted on the poisoning effect of various contaminants containing chlorine at ppm level (<10 ppm) on the performance of Ni-YSZ anode-supported solid oxide fuel cells. The results indicate that cell performance drops by exposure to 1 ppm Cl₂(g) at 750 掳C, whereas the introduction of Cl₂(g) with concentration higher than 5 ppm causes only a slight degradation at 850 掳C. The presence of 2–6 ppm CH₃Cl(g) and C₂H₃Cl(g) can also induce measurable cell performance decline at 750 and 850 掳C and this deterioration cannot be completely removed after switching to pure fuel at 850 掳C. No performance loss is found when the cell is operated in fuel containing 1–8 ppm HCl(g) at 750 and 850 掳C. It is thus concluded that chlorine in the form of Cl₂(g) yields the largest poisoning effect at 750 掳C, while the degradation rate caused by addition of C₂H₃Cl(g) increases with the increase of operation temperature. Agglomerations at anodic region are observed in the samples after poisoning test by Cl₂(g), CH₃Cl(g), and C₂H₃Cl(g), but the anode microstructure is uniform for the sample exposed to HCl(g) for poisoning test.