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The reverse Boudouard reaction in Direct Carbon Fuel Cells

机译：直接碳燃料电池中的反向Boudouard反应

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摘要

The Direct Carbon Fuel Cell (DCFC) has generated renewed attention recently, because of its potentially very high conversion efficiency. However, the performance of DCFC appears to be appreciably limited by the reverse Boudouard reaction, also termed "carbon corrosion" reaction. This paper aims to understand this limitation, by investigating the mechanism of carbon corrosion in molten carbonate. The open-circuit potential behavior of carbon in molten carbonate is measured. Analysis of its time-dependence suggests that in molten carbonate medium the reverse Boudouard reaction occurs as a result of two compensating electrochemical reactions. In addition, the wettability of the carbon electrode in molten carbonate plays an important role in the potential behavior. Direct observation confirms that the wetting phenomena are driven not only by capillary forces but also by the reverse Boudouard reaction. Finally, it is concluded that the anodic reaction of DCFC appears to be composed of multiple electrochemical reactions.
机译：直接碳燃料电池（DCFC）由于其潜在的非常高的转换效率，最近引起了新的关注。但是，DCFC的性能似乎受到反向Boudouard反应（也称为“碳腐蚀”反应）的限制。本文旨在通过研究熔融碳酸盐中的碳腐蚀机理来理解这一局限性。测量碳在熔融碳酸盐中的开路电势行为。对它的时间依赖性的分析表明，在碳酸盐熔融介质中，由于两个补偿性电化学反应的结果，发生了反向的Boudouard反应。另外，碳电极在熔融碳酸盐中的润湿性在电位行为中起重要作用。直接观察证实，润湿现象不仅由毛细作用力驱动，而且还由反向的Boudouard反应驱动。最后，得出结论，DCFC的阳极反应似乎由多个电化学反应组成。

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  • 来源
  • 会议地点 Vancouver(CA);Vancouver(CA)
  • 作者

    C. C. Chen; T. Maruyama; P. H. Hsieh; J. R. Selman;

  • 作者单位

    Department of Chemical and Biological Engineering,Illinois Institute of Technology, Chicago, IL 60616, USA;

    Department of Chemistry and Materials Engineering,Kansai University, Osaka 564-8680, Japan;

    Department of Chemical and Biological Engineering,Illinois Institute of Technology, Chicago, IL 60616, USA;

    Department of Chemical and Biological Engineering,Illinois Institute of Technology, Chicago, IL 60616, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 独立电源技术（直接发电）;
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