Consider that for every BTU of coal or natural gas burned in a combustion turbine only 35 percent of that is converted into useful power.

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These could be among the first full-scale power plants in the nation to turn powdered coal into a synthetic natural gas that is burned in a gas turbine whose exhaust gas powers a steam turbine.

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With a gas turbine for a second stage, one is now operating at a 56% electrical efficiency and at natural gas pipeline stepdown substations, they operate at 60% efficiency.

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