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首页> 外文期刊>Chemical engineering journal >Selection of appropriate fuel processor for biogas-fuelled SOFC system
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Selection of appropriate fuel processor for biogas-fuelled SOFC system

机译：为沼气供油的SOFC系统选择合适的燃料处理器

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摘要

The performance of biogas-fed solid oxide fuel cell (SOFC) systems utilizing different reforming agents (steam, air and combined air/steam) has been investigated via thermodynamic analysis to determine the most suitable feed. The boundary of carbon formation was first calculated to specify the minimum amount of each reforming agent necessary to avoid carbon formation. The SOFC performance (electrical efficiency and power density) was determined at different biogas compositions and reforming agent:biogas ratios. The SOFC performance is better when the methane content in the biogas is higher. Steam is considered to be the most suitable reforming agent in this study as the steam-fed SOFC offers much higher power density than the air-fed SOFC although its electrical efficiency is slightly lower. When steam is added in the air-fed SOFC as in the case of the co-fed SOFC, the power density can be improved but the electrical efficiency becomes lower compared with the case of the air-fed SOFC. Finally, in order to improve the electrical efficiency of the steam-fed SOFC, the biogas split option was proposed. It was found that a higher electrical efficiency can be achieved. In addition, although the power density is lowered by this operation, the value is still higher than the case of the air-fed SOFC.
机译：通过热力学分析，研究了利用不同重整剂（蒸汽，空气和空气/蒸汽组合）的沼气供气固体氧化物燃料电池（SOFC）系统的性能，以确定最合适的进料。首先计算碳形成的边界以指定避免碳形成所需的每种重整剂的最小量。 SOFC性能（电效率和功率密度）是在不同的沼气组成和重整剂：沼气比率下确定的。当沼气中甲烷含量较高时，SOFC性能会更好。在本研究中，蒸汽被认为是最合适的重整剂，因为蒸汽供电的SOFC比空气供电的SOFC提供更高的功率密度，尽管其电效率略低。如在共同进给的SOFC的情况下，当在空气进给的SOFC中添加蒸汽时，可以提高功率密度，但是与空气进给的SOFC的情况相比，电效率变低。最后，为了提高以蒸汽为燃料的SOFC的电效率，提出了沼气分离方案。发现可以实现更高的电效率。另外，尽管通过该操作降低了功率密度，但是该值仍然高于空气馈送的SOFC的情况。

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