Effect of Coal Contaminants on Solid Oxide Fuel System Performance and Service Life. Final Technical Report for October 1, 2005 to September 30, 2008.

Krishnan, G. ; Jayaweera, P. ; Bao, J. ; Perez, J. ; Lau, K. H.

Technical Information Center Oak Ridge Tennessee

关键词: Solid oxide fuel cells;    Coal gasification;    Anodes;    Nickel alloys;    Coal;   

RP-ID  :  DE2009957507

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The U.S. Department of Energys SECA program envisions the development of high-efficiency, low-emission, CO2 sequestration-ready, and fuel-flexible technology to produce electricity from fossil fuels. One such technology is the integrated gasification-solid oxide fuel cell (SOFC) that produces electricity from the gas stream of a coal gasifier. SOFCs have high fuel-to-electricity conversion efficiency, environmental compatibility (low NOx production), and modularity. Naturally occurring coal has many impurities and some of these impurities end in the fuel gas stream either as a vapor or in the form of fine particulate matter. Establishing the tolerance limits of SOFCs for contaminants in the coal-derived gas will allow proper design of the fuel feed system that will not catastrophically damage the SOFC or allow long-term cumulative degradation. The anodes of Ni-cermet-based SOFCs are vulnerable to degradation in the presence of contaminants that are expected to be present in a coal-derived fuel gas stream. Whereas the effects of some contaminants such as H2S, NH3 and HCl have been studied, the effects of other contaminants such as As, P, and Hg have not been ascertained.