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The Kellogg Brown and Root (KBR) Transport Gasifier is under development at the Power Systems Development Facility (PSDF) in Wilsonville, Alabama. PSDF is a clean coal technology test facility built with DOE sponsorship and operated by the Southern Company since 1996. The KBR Transport Gasifier is a hybrid gasifier that has characteristics of both an entrained flow and a fluidized bed reactor.
The gasifier temperature is maintained below the ash melting point of the coal, and this favors the use of air rather than oxygen since the nitrogen in the air serves to moderate the temperatures within the fluidized bed, while also supplying the velocity needed to entrain the solids. Because of its lower operating temperature and its dry feed arrangement, the KBR reactor is most attractive for lower rank, high moisture coals. The lower temperatures also eliminate the need for refractory lining of the gasifier vessel.
The KBR Transport Gasifier will be used in the 550-MW Kemper County IGCC Project scheduled for startup in 2013 in Mississippi. The Southern Company, its subsidiary Mississippi Power, and KBR are sponsors of the project. |
