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A high performance ceria-based solid oxide fuel cell operating on underground coal gasification gas

机译：基于地下煤气化气体的高性能二氧化铈基固体氧化物燃料电池

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摘要

This paper investigates the equilibrium species and theoretical electromotive forces (EMF) of cells fed with 3% H2O humidified simulated underground coal gasification (UCG) gas, and the performance of an anode-supported NiO-Gd0.1Ce0.9O2-delta (GDC)parallel to(GDC)parallel to Ba0.9Co0.7Fe0.2Nb0.1O3-delta (B0.9CFN) cell operated with the UCG gas. The results show that EMF values are always above 1.05 V, and the UCG gas fed cell exhibits maximum power densities of 0.151, 0.299, 0.537 and 0.729 W cm(-2) at 500, 550, 600 and 650 degrees C, respectively, slightly inferior to that of hydrogen fed cell of 0.330, 0.544, 0.765 and 0.936 W cm(-2), respectively, as a result of the sluggish reaction kinetics of the UCG gas at the anode. However, the synergy between slow anode reaction kinetics and the sufficient and fast migration of oxygen ions to the anode, attributed to the using of GDC electrolyte and B0.9CFN cathode, suppresses carbon deposition at intermediate temperatures. Only a slight current density decrease ranging from 0.2959 to 0.2790 A cm(-2) is observed during the 480 h of durability testing under a constant 0.7 V output voltage at 600 degrees C for the UCG gas fed cell. The subsequent SEM inspection of the tested cell indicated no measurable carbon deposition on the anode surface, thereby demonstrating that UCG gas is a promising fuel for utilization in SOFCs.
机译：本文研究了3％H2O加湿的模拟地下煤气化（UCG）气体喂养的电池的平衡种类和理论电动势（EMF），以及阳极支撑的NiO-Gd0.1Ce0.9O2-δ（GDC）的性能平行于（GDC）平行于使用UCG气体操作的Ba0.9Co0.7Fe0.2Nb0.1O3-δ（B0.9CFN）电池。结果表明，EMF值始终高于1.05 V，并且在500、550、600和650摄氏度下，UCG气体馈电电池的最大功率密度分别为0.151、0.299、0.537和0.729 W cm（-2）。由于UCG气体在阳极处的反应动力学缓慢，其氢送入电池的送氢性能分别低于0.330、0.544、0.765和0.936 W cm（-2）。但是，归因于使用GDC电解质和B0.9CFN阴极，阳极反应动力学慢和氧离子向阳极充分快速迁移之间的协同作用抑制了中间温度下的碳沉积。对于UCG充气电池，在600摄氏度的恒定0.7 V输出电压下进行480小时的耐久试验期间，仅观察到电流密度从0.2959至0.2790 A cm（-2）的轻微降低。随后对测试电池进行的SEM检查表明，阳极表面没有可测量的碳沉积，从而证明UCG气体是用于SOFC的有前途的燃料。

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