An Analysis of Biogas Reforming Process on Ni/YSZ and Ni/SDC Catalysts
An Analysis of Biogas Reforming Process on Ni/YSZ and Ni/SDC Catalysts
复制标题
Ni/YSZ和Ni/SDC催化剂沼气重整过程分析
DOI：
10.5541/ijot.1034000315
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发表时间：
2012
影响因子：
0.8
通讯作者：
J. Szmyd
中科院分区：
文献类型：
--
作者：
G. Brus;Y. Komatsu;S. Kimijima;J. Szmyd
将沼气转化为电力为燃料电池提供了一个有吸引力的利基应用。因此，已经尝试使用沼气作为高温燃料电池系统例如SOFC的燃料。沼气可以在重整过程中转化为富氢燃料。对于烃基燃料，重整反应可以考虑三种类型的燃料转化：外部重整系统、间接内部重整系统和直接内部重整系统。高温 SOFC 无需昂贵的外部重整系统。使用内部重整的可能性是像SOFC这样的高温燃料电池的特征之一。然而，对于高温运行，SOFC系统的热管理成为一个重要问题。为了正确地进行热管理，需要对 SOFC 系统内部发生的现象进行详细的建模和数值分析。在目前的工作中，对 Ni/YSZ 和 Ni/SDC 催化剂上的沼气重整过程进行了数值和实验研究。进行的测量包括不同的热边界条件、蒸汽与碳的比率和几种不同的燃料成分。提出了包含甲烷/蒸汽重整反应、干重整反应和变换反应的数值模型来预测重整器出口处的气体混合物组成。将数值计算结果与实验数据进行了比较，结果吻合良好。结果表明了综合、数值和实验研究在 SOFC 重整器设计中的重要性。使用的组合方法可以成功预测不同建模条件下的出口气体成分。
The conversion of biogas to electricity presents an attractive niche application for fuel cells. Thus attempts have been made to use biogas as a fuel for high temperature fuel cell systems such as SOFC. Biogas can be converted to hydrogen-rich fuel in a reforming process. For hydrocarbon-based fuel, three types of fuel conversion can be considered in reforming reactions: an external reforming system, an indirect internal reforming system and a direct internal reforming system. High-temperature SOFC eliminates the need for an expensive external reforming system. The possibility of using internal reforming is one of the characteristics of high temperature fuel cells like SOFC. However, for high-temperature operation, thermal management of the SOFC system becomes an important issue. To properly carry out thermal management, both detailed modeling and numerical analyses of the phenomena occurring inside the SOFC system is required. In the present work, the process of reforming biogas on a Ni/YSZ and a Ni/SDC catalyst has been numerically and experimentally investigated. Measurements including different thermal boundary conditions, steam-to-carbon ratios and several different fuel compositions were taken. A numerical model containing methane/steam reforming reaction, dry reforming reaction and shift reaction has been proposed to predict the gas mixture composition at the outlet of the reformer. The results of the numerical computation were compared with experimental data and good agreement has been found. The results indicate the importance of combined, numerical and experimental studies in the design of SOFC reformers. The combined approach used leads to the successful prediction of the outlet gas composition for different modelling conditions.