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Cleaner Coal Technology

Tampa, Florida

The Polk Power Plant removes 97.5 percent of the sulfur commonly found in coal before it reaches the combustion process, keeping it in the plant and out of the atmosphere.

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  Mark Hornick, general manager of TECO's Polk Power Plant, explains how IGCC technology produces a cleaner burning fuel.

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  • Electricity generation with GE's IGCC technology is reducing emissions compared to traditional coal-fired plants by nearly 15,000 tons of sulfur dioxide and more than 8,000 tons of nitrogen oxides.
  • Cleaner Coal technology reduces mercury emissions by half compared to conventional coal-fired plants yet the cost of removing 1 pound of mercury is 11 times less expensive.
  • The Integrated Gasification Combined Cycle (IGCC) process at the Polk Power Plant functions in a multi-stage process. Fresh coal is introduced to the slurry preparation via conveyor belt. A slurry, or mixture of coal and water, is fed into the gasification process where the water and remnant material, or slag, is separated from the raw syngas, a gaseous mixture of hydrogen and carbon. The raw syngas is then hydrolysized and passed into the acid removal process. Here the existing sulfuric acid produced during hydrolyzation is removed and the remaining "clean" syngas is passed to combustion where it is burned to produce electricity.
  • The removed Sulfuric Acid is sent to the Sulfuric Acid Plant where 99.5 percent of the SOx is removed. This produces a 98 percent sulfuric acid which is sold and marketed to the local phosphate industry.
  • The remaining waste material from the production of the syngas is known as slag. The slag is processed into ground granulated slag and used by local companies towards the production of cement.
  • Source:
    ecomagination.com
    GE Energy
    Polk Plant Technical Report