Performance of Solid Oxide Fuel Cells on H_2, NH_3 and Hydrocarbon Fuels

摘要

The different gases such as H_2, CH_4, C_3H_8, NH_3 or simulated underground coal gasification (UCG) gas can be used as fuel in SOFC. Basis on the thermochemical calculations, the performances of ceria-based electrolyte anode-supported cells operated on the five fuels were measured. As a result, for C_(3H8) fuel, the measured OCV decreased rapidly at lower temperatures, indicating sluggish reaction kinetics at the anode. However, the synergy between slow anode reaction kinetics and fast migration of oxide ions to the anode suppresses carbon deposition at low operating temperatures, which leads to better cell durability. Overall, the UCG gas fed cell exhibited much increased stability than any other hydrocarbons, which demonstrates that UCG gas is a promising fuel for utilization in SOFCs.