In the face of ever escalating costs for fuel oil or natural gas, the utility industry worldwide is investigating the use of coal-based alternatives that offer environmental acceptability and the potential for low-cost electrical power. One attractive alternative is to repower existing oil- or gas-fired power plants with gasified coal-fired gas turbines. Comparisons are made of a 400-MW steam station repowered with Texaco gasification, a grass roots integrated gasification current technology gas turbine, combined-cycle power plant and a conventional coal-fired power plant with flue gas desulfurization. The advantages of repowering are discussed.

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