Influence of Operating Conditions on Carbon Deposition in SOFCs Fuelled by Tar-Containing Biosyngas
Influence of Operating Conditions on Carbon Deposition in SOFCs Fuelled by Tar-Containing Biosyngas
复制标题
操作条件对含焦油生物合成气燃料SOFC碳沉积的影响
DOI：
10.1149/2.027111jes
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发表时间：
2011
影响因子：
3.9
通讯作者：
N. Brandon
中科院分区：
文献类型：
--
作者：
Ming Liu;M. Millan;P. Aravind;N. Brandon
本研究提出了操作条件，包括蒸汽水平，电流密度和时间上流的性能的固体氧化物燃料电池（SOFC）与镍/氧化钇稳定的氧化锆（Ni/YSZ）阳极的焦油含生物合成气为燃料。分析了接触焦油后SOFC的阻抗谱和极化曲线的变化，以评估电池性能。在这些测量中使用的生物合成气组成和焦油浓度与从将连接到SOFC系统的商业鼓风生物质气化器测量的那些相同。在本工作中使用的焦油浓度下操作这种类型的SOFC可能会由于阳极上的碳形成而导致电池的严重损坏。通过扫描电子显微镜（SEM）观察到了积碳现象，并通过电化学阻抗谱和阳极极化曲线研究了积碳对SOFC性能的影响。但是，可以通过增加蒸汽水平和电流负荷来降低积碳的风险。
This study presents the influence of operating conditions including steam levels, current density and time on stream on the performance of solid oxide fuel cells (SOFCs) with Nickel/Yttria Stabilized Zirconia (Ni/YSZ) anodes fuelled by tar-containing biosyngas. Changes in impedance spectra and polarization curves of SOFCs after tar exposure were analysed to assess the cell performance. The biosyngas composition and the tar concentration used in these measurements were identical to those measured from a commercial air-blown biomass gasifier that is to be connected to a SOFC system. Operating this type of SOFC under the tar concentrations used in this work could result in severe damage of the cell due to carbon formation on the anodes. Carbon deposition was observed by Scanning Electron Microscopy (SEM) and affected the performance of the SOFC, as shown by the impedance spectra and anode polarization curves of the cells after exposure to tars. However, the risk of carbon deposition can be reduced by increasing steam levels and current loads.