The Integrated Gasification Combined Cycle (IGCC) has the potential to be one of the most efficient and environmentally acceptable methods of generating electric power. To date, the majority of IGCC concepts have been for new grass roots power plants located at a fictitious mid-western site and burning Illinois No. 6 coal. Under DOE-sponsorship, conceptual design studies were made of both a grass roots installation and a repowering of the Albany Plant of the Niagara Mohawk Power Corporation. Both designs are based upon the use of Texaco gasifiers using a Western Pennsylvania coal. The estimated performance, economics and emissions are compared for these power plants.

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