Effect of Simulated Coal-Derived Gas Composition on H[sub 2]S Poisoning Behavior Evaluated Using a Disaggregation Scheme

poisoning is an important issue for solid oxide fuel cells (SOFCs) operated with syngas. The effect of simulated coal-derived gas composition on poisoning behavior was evaluated using a disaggregation scheme where the influence of content was determined separately using a typical anode-supported SOFC operated with a mixture gas, while the effect of other compositions (CO, , and ) was investigated with simulated coal-derived gas having constant and CO flow rates balanced by a mixture gas (83% and 17% ). The results indicated that the extent of poisoning was not pertinent to content when the cell was tested galvanostatically with a current density of at using a mixture gas containing 10 ppm , and the poisoning impact can be completely removed by switching to sulfur-free gas. The CO, , and high water vapor content aggravated the poisoning effect, and the performance was almost irrecoverable when the cell was tested with a 35% mixture gas containing 12.5 ppm . However, the introduction of 10% and an increase in content from 3 to 10% in the mixture gas can promote the performance recoverability to a larger extent.