Edwardsport Power Station
Country	United States
Location	Vigo Township,Knox County, nearEdwardsport,Indiana
Coordinates	38°47′56″N87°15′0″W / 38.79889°N 87.25000°W /38.79889; -87.25000
Status	Operational
Construction began	1918
Commission date	(old site) Unit 1: 1918 Unit 2: 1944 Unit 3: 1949 Unit 4: 1951 (new site) Unit 1: June, 2013
Decommission date	(old site) Unit 1: n.a. Unit 2: 2010 Unit 3: 2010 Unit 4: 2010
Construction cost	US$3.4 billion
Owner	Duke Energy
Operator	Duke Energy
Employees	120
Thermal power station
Primary fuel	Bituminous coal
Secondary fuel	Coal-derived Syngas
Tertiary fuel	Natural gas
Turbine technology	Integrated gasification combined cycle
Cooling source	White River
Combined cycle?	Yes
Power generation
Units operational	1
Units decommissioned	4
Nameplate capacity	618MW
Capacity factor	73%
Annual net output	4000GW·h
[edit on Wikidata]

Edwardsport Power Station is a 618 MWIntegrated gasification combined cycle (IGCC) coal based power plant inVigo Township,Knox County, near the town ofEdwardsport, Indiana. The integratedgasificationcombined cycle power plant (Edwardsport IGCC) construction started in June 2008 byDuke Energy near the site of an older 160 MWcoal-firedelectrical power plant, which was decommissioned in 2010.

Edwardsport IGCC began commercial operations in June 2013.^[1]

First development was in 1918, followed by Units 2, 3 and 4, rated at 42.5, 42.5 and 75 MW respectively, were placed into service in 1944, 1949 and 1951.^[2] The smaller, older units were retired when the new 618-MW plant came online.The old Edwardsport plant was officially taken offline in late 2011, and deconstruction began in mid-2010. The old Edwardsport plant was demolished in late October 2012.

In 2007, Duke Energy Indiana began construction of a 618 megawatt (MW) integrated gasification combined cycle power plant (IGCC). This plant was to be the first of its kind of its size. Thegasification process makes coal react with pure oxygen and steam to produce synthetic gas, or syngas. Syngas burns cleaner than burning directly the coal and stripping the pollutants out of the exhaust gas. And syngas may be used to fire a combustion turbine. The combustion turbine exhaust gases are then routed through a largeheat recovery steam generator that is used in conjunction with asteam turbine to further increase the plant's efficiency. The new plant is slated to be a base-load station.The construction of the plant has reserved the necessary space required forcarbon capture and storage if Duke Energy decides to add this component to the plant at a later date.^[3] However, when the plant was originally planned, it was thought the site was ready for carbon injection. After conducting further research, it was determined that the site is actually not geologically suitable for underground storage of carbon. Instead, Duke Energy Indiana would need to seek approval to construct a pipeline to transport carbon to a more suitable site.

Edwardsport's pollution per unit of energy produced will be greatly reduced, asparticulate matter andmercury will be removed from thesyngas. The coal-derived synthetic gas is much cleaner than conventional coal combustion to begin with, and it is easier to clean to greater extent. Coal gasification allowscarbon capture to occur before the fuel is combusted — a much easier and economically feasible operation than carbon capture of exhaust gases.

The power plant has two trains ofGeneral Electric radiant quench gasification equipment. Each train fuels a General Electric 7FB 236 MW combustion turbine.Following each GE turbine is aDoosan two pressureHeat recovery steam generator (HRSG). Both HRSG recovered steam powers a single General Electric G13 326 MW four flow, reheat steam turbine. The plant is so defined as a 2 x 1 Combined Cycle. Gross power is 800 MW, but the syngas process consumes much energy, leaving only 618 MW net power to the grid. To save water, cooling is helped by a 20 cell mechanical draft cooling tower.

The construction of the Edwardsport IGCC has been clouded in controversy and legal troubles for both Duke Energy Indiana and the Indiana Utility Regulatory Commission. Thus far, the legal issues have resulted in the resignation of the second highest ranked executive for Duke Energy, the dismissal of the Chairman of the IURC, David Lott Hardy, and Hardy's subsequent indictment for three felony counts of official misconduct in cases concerning Duke Energy,^[4] although the charges were dismissed on 12 August 2013.^[5][6]

• List of power stations in Indiana

• Edwardsport production data fromEIA

• Energy infrastructure completed in 1944
• Energy infrastructure completed in 1945
• Energy infrastructure completed in 1951
• Coal-fired power stations in Indiana
• Southwestern Indiana
• Buildings and structures in Knox County, Indiana
• Duke Energy
• 1944 establishments in Indiana

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