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Anode protection system for shutdown of solid oxide fuel cell system

United States Patent

December 30, 2014
View the Complete Patent at the US Patent & Trademark Office
An Anode Protection Systems for a SOFC system, having a Reductant Supply and safety subsystem, a SOFC anode protection subsystem, and a Post Combustion and slip stream control subsystem. The Reductant Supply and safety subsystem includes means for generating a reducing gas or vapor to prevent re-oxidation of the Ni in the anode layer during the course of shut down of the SOFC stack. The underlying ammonia or hydrogen based material used to generate a reducing gas or vapor to prevent the re-oxidation of the Ni can be in either a solid or liquid stored inside a portable container. The SOFC anode protection subsystem provides an internal pressure of 0.2 to 10 kPa to prevent air from entering into the SOFC system. The Post Combustion and slip stream control subsystem provides a catalyst converter configured to treat any residual reducing gas in the slip stream gas exiting from SOFC stack.
Li; Bob X. (Grand Blanc, MI), Grieves; Malcolm J. (Fairport, NY), Kelly; Sean M. (Pittsford, NY)
Delphi Technologies, Inc (Troy, MI)
13/ 714,664
December 14, 2012
GOVERNMENT-SPONSORED STATEMENT This invention was made with the United States Government support under Contract DE-FC-26-08NT-0003894 awarded by the U.S. Department of Energy. The Government has certain rights in this invention.