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METHOD FOR ADDING SULFUR TO A FUEL CELL STACK SYSTEM FOR IMPROVED FUEL CELL STABILITY

United States Patent Application

20130302709
A1
View the Complete Application at the US Patent & Trademark Office
A method is provided for adding sulfur to a solid oxide fuel cell (SOFC) stack having a Ni--YSZ anode to prolong the life of the SOFC stack. The method includes the steps of providing a reformate stream essentially free of sulfur compounds, feeding the reformate stream to the SOFC stack, and adding a predetermined amount of a sulfur compound into the reformate stream upstream of the SOFC stack. The predetermined amount of the sulfur compound is effective to prolong the life of the Ni--YSZ anode by retarding the formation of carbon onto the Ni--YSZ anode and the coarsening of the granular microstructure of the Ni--YSZ anode, while minimizing the degradation of power output of the SOFC stack within a predetermined limit.
MUKERJEE, SUBHASISH (HORSHAM, GB), HALTINER,, JR., KARL JACOB (FAIRPORT, NY), WIESSMAN, JEFFREY G. (GUILFORD, CT)
13/ 938,504
July 10, 2013
GOVERNMENT-SPONSORED STATEMENT [0002] This invention was made with the United States Government support under Contract DE-FC26-02NT41246 awarded by the U.S. Department of Energy. The Government has certain rights in this invention.