Development of a Portable SOFC System with Internal Partial Oxidation Reforming of Butane and Steam Reforming of Ethanol

Wednesday, 4 October 2017: 11:20
National Harbor 7 (Gaylord National Resort and Convention Center)
H. Sumi, T. Yamaguchi, H. Shimada, Y. Fujishiro, and M. Awano (National Institute of AIST)
Internal partial oxidation reforming of butane and steam reforming of ethanol were investigated using microtubular solid oxide fuel cells (SOFCs) supported on nickel-gadolinia doped ceria (Ni-GDC) anode for portable power sources in an emergency situation and mobilities such as vehicles, robots and drones. At oxygen/carbon (O/C) ratio of 1.0, which is a coking condition in the equilibrium, the Ni-GDC anode deteriorated for 28 h by internal partial oxidation of butane at 650 oC. However, power generation was also impossible after 8 and 79 h at S/C = 1.0 and 1.5, respectively, by internal steam reforming of ethanol in spite of no carbon deposition condition in the equilibrium at 650 oC. Power can be generated over a period of more than 100 h at O/C = 1.5 in butane and at S/C = 2.0 in ethanol. The O/C and S/C ratios are significantly important to prevent carbon deposition on the Ni-GDC anode for internal partial oxidation reforming of methane and steam reforming of ethanol in SOFCs.