Thermodynamic analysis of a solid oxide fuel cell system fuelled by ethanol
Thermodynamic analysis of a solid oxide fuel cell system fuelled by ethanol
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DOI：
10.1016/s0378-7753(01)00803-5
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发表时间：
2001-12
影响因子：
9.2
通讯作者：
P. Tsiakaras;A. Demin
中科院分区：
文献类型：
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作者：
P. Tsiakaras;A. Demin
在本研究中，进行了详细的热力学分析，以便通过使用不同的氧化剂进行初步燃料重整，提供有关在固体氧化物燃料电池（SOFC）中使用乙醇作为替代燃料的有用信息。 SOFC被认为是用乙醇的热力学平衡产物供给的，(a)蒸汽重整，(b)用CO 2 重整和(c)用空气部分氧化。假设初始系统的氧化剂/乙醇比例不同，在 800 至 1200K 的温度范围内，在热力学上不可能形成碳的区域进行平衡计算。研究发现，当 SOFC 电化学部分由乙醇蒸汽重整产物供给时，在 T<950 和 >1100K 时实现最大 SOFC 系统效率，而在中间温度区域，似乎更优选为 SOFC 电化学部分供给乙醇与二氧化碳重整的产物。如果乙醇部分氧化产物进入 SOFC 电化学部分，则可获得的最大 SOFC 系统效率比之前情况下的最大 SOFC 系统效率低约 20%。
In the present study, a detailed thermodynamic analysis has been carried out in order to provide useful information concerning ethanol utilization as alternative fuel in solid oxide fuel cells (SOFCs) by using different oxidants for preliminary fuel reforming. The SOFC was considered being fed with the thermodynamic equilibrium products of ethanol, (a) steam reforming, (b) reforming with CO2and (c) partial oxidation with air. Equilibrium calculations were performed in the region where carbon formation is thermodynamically impossible, in the temperature range between 800 and 1200K assuming different oxidant/ethanol ratios of the initial system. It was found that the maximum SOFC system efficiency at T<950 and >1100K is achieved when the SOFC electrochemical section is fed by the products of ethanol steam reforming, whereas at the intermediate temperature region it seems more preferable to feed the SOFC electrochemical section with the products of ethanol reforming with carbon dioxide. Maximum obtainable SOFC system efficiency if the products of ethanol partial oxidation feed the SOFC electrochemical section is about 20% less compared to the maximum SOFC system efficiency in the previous cases.