Topic Area 2A - Effect of Coal Contaminants on Solid Oxide Fuel Cell System Performance and Service Life

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Topic Area 2A - Effect of Coal Contaminants on Solid Oxide Fuel Cell System Performance and Service Life: Topic Area 2A Effect of Coal Contaminants on SolidOxide Fuel Cell SystemPerformance and Service LifeApplications are sought to investigate the degradation mechanisms andeffectsof coal contaminants on solid oxide fuel cells. SOFCs being developedunderthe Solid State Energy Conversion Alliance (SECA) are expected to operateat700 to 900 degrees C on coal derived hydrogen rich synthesis fuel.Contaminants in gasified coal vary considerably with the gasificationtechnology used and the coal feedstock. Previous DOE funded studies haveidentified likely chemical species and concentration levels. Chemicalspeciesof initial interest are identified in the table below. It is necessary tounderstand the sensitivity of solid oxide fuel cells (SOFCs) to coalcontaminants to enable assessing the catastrophic damage risk andmechanisms ifhigher than planned levels of contaminants slip past coal clean up systems.Anadditional objective is to understand the impact of long term cumulativedegradation to SOFC performance and service life for low level exposure tocoalsynthesis gas stream contaminants. The SOFC electrochemical reactionenvironment may or may not exacerbate the impact of coal contaminants ontheanode processes and hence performance. The anode presents a reducingenvironment with increasing steam content from inlet to outlet that canenhancecontamination and corrosion mechanisms. It is anticipated thatinvestigationfindings will be critical in establishing failure mode and effect criteriaforcoal gasification clean up systems that supply SECA based SOFC generationplants.Refer to the Master Funding Opportunity Announcement attached to thiswebpagefor a listing of contaminants.