Abstract Solid oxide fuel cell (SOFC) is one of the most attractive energy conversion systems, while dimethyl ether (DME) is an alternative clean fuel, and thus the application of DME in SOFC has great attraction. Fuel compositions are mainly determined by fuel processing technologies, which can affect the cell efficiency. In this paper, the relationships among fuel composition, oxygen to carbon (O/C) ratio, carbon deposition and cell efficiency are investigated for different DME processing technologies. According to the calculated results, SOFC with steam reforming of DME has the highest efficiency at the same O/C ratio and equivalent fuel utilization, while for catalytic partial oxidation of DME, the cell efficiency decreases rapidly with the increase of O/C ratio. The efficiency of SOFC with CO2 reforming of DME decreases with the increase of O/C ratio, especially at high O/C ratio and low equivalent fuel utilization. When the O/C ratio is 1.5, solid carbon can't be formed, where the cell efficiencies are 51.7% for steam reforming of DME, 42.2% for DME reforming with H2O and O2, 32.7% for catalytic partial oxidation of DME, 49.3% for DME reforming with anode off-gas and 41.4% for CO2 reforming of DME at 80% equivalent fuel utilization.

中文翻译：

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燃料成分的热力学分析以及不同二甲醚加工技术对电池效率的影响

摘要 固体氧化物燃料电池（SOFC）是最具吸引力的能量转换系统之一，而二甲醚（DME）是一种可替代的清洁燃料，因此二甲醚在SOFC中的应用具有很大的吸引力。燃料成分主要由燃料加工技术决定，这会影响电池效率。在本文中，研究了不同 DME 加工技术的燃料成分、氧碳 (O/C) 比、碳沉积和电池效率之间的关系。计算结果表明，在相同O/C比和等效燃料利用率下，DME蒸汽重整SOFC的效率最高，而DME催化部分氧化，随着O/C比的增加，电池效率迅速下降。SOFC 对 DME 进行 CO2 重整的效率随着 O/C 比的增加而降低，尤其是在高 O/C 比和低当量燃料利用率时。当O/C比为1.5时，不能形成固体碳，其中DME蒸汽重整的电池效率为51.7%，H2O和O2重整DME为42.2%，DME催化部分氧化为32.7%，49.3在 80% 的等效燃料利用率下，DME 使用阳极废气重整的百分比为 41.4%，DME 的 CO2 重整为 41.4%。