Abstract
Conventional solid oxide fuel cells (SOFC) utilize nickel / yttria-stabilized zirconia cermet anodes that are rapidly poisoned by sulfur. Hydrogen sulfide content in the reformate of 2 ppmv (at 1000{degree sign}C) is known to poison the anode. Military fuels, such as JP-8 and JP-5, contain total sulfur levels that far exceed the levels that can damage the typical anode. Typical sulfur levels for these fuels would be 500-600 ppmv for the reformate from a steam reformer and 300-400 ppmv from a partial oxidation reformer. Though most systems utilize a desulfurization step, occasional sulfur slip must be anticipated. Research at Ceramatec, Inc has developed an approach to increasing sulfur tolerance through a combination of material selection and modification.
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