Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes such as waste incineration, petroleum refineries, cement and lime kilns.
A fossil fuel power station is a thermal power station which burns a fossil fuel, such as coal or natural gas, to produce electricity. Fossil fuel power stations have machinery to convert the heat energy of combustion into mechanical energy, which then operates an electrical generator. The prime mover may be a steam turbine, a gas turbine or, in small plants, a reciprocating gas engine. All plants use the energy extracted from the expansion of a hot gas, either steam or combustion gases. Although different energy conversion methods exist, all thermal power station conversion methods have their efficiency limited by the Carnot efficiency and therefore produce waste heat.
Navajo Generating Station was a 2.25-gigawatt, coal-fired power plant located on the Navajo Nation, near Page, Arizona, United States. This plant provided electrical power to customers in Arizona, Nevada, and California. It also provided the power for pumping Colorado River water for the Central Arizona Project, supplying about 1.5 million acre feet (1.85 km3) of water annually to central and southern Arizona. As of 2017 permission to operate as a conventional coal-fired plant was anticipated until 2017–2019, and to December 22, 2044, if extended. However, in 2017, the utility operators of the power station voted to close the facility when the lease expires in 2019. In March 2019, the Navajo Nation ended efforts to buy the plant and continue running it after the lease expires.
Coal pollution mitigation, sometimes labeled as clean coal, is a series of systems and technologies that seek to mitigate health and environmental impact of burning coal for energy. Burning coal releases harmful substances, including mercury, lead, sulfur dioxide (SO2), nitrogen oxides (NOx), and carbon dioxide (CO2), contributing to air pollution, acid rain, and greenhouse gas emissions. Methods include flue-gas desulfurization, selective catalytic reduction, electrostatic precipitators, and fly ash reduction focusing on reducing the emissions of these harmful substances. These measures aim to reduce coal's impact on human health and the environment.
Homer City Generating Station is a decommissioned 2-GW coal-burning power station near Homer City, in Indiana County, Pennsylvania, USA. It is owned by hedge funds and private equity firms and is operated by NRG Energy. Units 1 and 2, rated at 660 MWe, began operation in 1969. Unit 3, rated at 692 MWe nameplate capacity, was launched in 1977. It employed about 124 people.
The Keystone Generating Station is a 1.71-gigawatt, coal power plant located on roughly 1,500 acres (610 ha) in Plumcreek Township, southeastern Armstrong County, Pennsylvania near Crooked Creek, just west of Shelocta, Pennsylvania.
Cumberland Fossil Plant is a pulverized coal-fired power station located west of Cumberland City, Tennessee, US, on the south bank of Lake Barkley on the Cumberland River. Owned and operated by Tennessee Valley Authority (TVA), it has a gross capacity of 2,470 MW, and is the most powerful power station in Tennessee.
The W. H. Sammis Power Plant was a 2.23-gigawatt coal power plant in Stratton, Jefferson County, Ohio. The plant was operated by Energy Harbor. It began operations in 1960.
The Acid Rain Program is a market-based initiative taken by the United States Environmental Protection Agency in an effort to reduce overall atmospheric levels of sulfur dioxide and nitrogen oxides, which cause acid rain. The program is an implementation of emissions trading that primarily targets coal-burning power plants, allowing them to buy and sell emission permits according to individual needs and costs. In 2011, the trading program that existed since 1995 was supplemented by four separate trading programs under the Cross-State Air Pollution Rule (CSAPR). On August 21, 2012, the United States Court of Appeals for the District of Columbia issued its Opinion and Order in the appeal of the Cross State Air Pollution Rule (CSAPR) for two independent legal reasons. The stay on CSAPR was lifted in October 2014, allowing implementation of the law and its trading programs to begin.
Coal generated about 19.5% of the electricity at utility-scale facilities in the United States in 2022, down from 38.6% in 2014 and 51% in 2001. In 2021, coal supplied 9.5 quadrillion British thermal units (2,800 TWh) of primary energy to electric power plants, which made up 90% of coal's contribution to U.S. energy supply. Utilities buy more than 90% of the coal consumed in the United States. There were over 200 coal powered units across the United States in 2022. Coal plants have been closing since the 2010s due to cheaper and cleaner natural gas and renewables. Due to measures such as scrubbers air pollution from the plants kills far fewer people nowadays, but deaths in 2020 from PM 2.5 have been estimated at 1600. Environmentalists say that political action is needed to close them faster, to also reduce greenhouse gas emissions by the United States and better limit climate change.
John E. Amos Power Plant is a three-unit coal-fired power plant owned and operated by Appalachian Power, a subsidiary of American Electric Power (AEP). With a nameplate rating of 2,933 MW, it is the largest generating plant in the AEP system. It was named after John E. Amos, a prominent state senator, Democratic National Committee member from West Virginia, and member of the AEP board of directors.
General James M. Gavin Power Plant is a 2,600-megawatt supercritical coal-fired power station in the village of Cheshire, Ohio, United States. It is owned by Lightstone Generation LLC, a 50–50 joint venture of The Blackstone Group L.P. and ArcLight Capital Partners. Gavin is the largest coal-fired power facility in Ohio, and one of the largest in the US, capable of powering two million homes. In February 2017, the plant represented slightly more than 11% of the total electric generation capacity in Ohio according to the Energy Information Administration (EIA). The plant was named in honor of James Maurice "Jumpin' Jim" Gavin, the third Commanding General (CG) of the 82nd Airborne Division during World War II.
The Charles P. Crane Generating Station was a 400 megawatt (MW) coal power plant located on the Carroll Island Road in Bowleys Quarters, Maryland, 14 miles (23 km) east of Baltimore. The power plant was operated by C.P. Crane, LLC, a subsidiary of Avenue Capital Group. The station had two coal-fired generating units, rated at 190 and 209 MW nominal capacity, and powered by cyclone steam boilers. It also had a 16 MW oil-fired combustion turbine. The Crane station occupies 157 acres (64 ha) on the Middle River Neck Peninsula adjacent to the Seneca Creek tributary of the Gunpowder River, and is on the rural side of the Baltimore County Urban Rural Demarcation Line. The plant was closed in June 2018 and demolished via building implosion in August 2022.
Warrick Generating Station is a 755-MWe coal-fired electricity-generating station, located southeast of Newburgh in Warrick County. It sits on the north bank of Ohio River, downstream of the F. B. Culley Generating Station. The plant has four coal-fired, steam-powered turbines with a combined generating capacity of 791 MWe. Alcoa owns three of the four generating stations, which were placed into service in the early 1960s. The largest unit, known as Unit 4, is 323-MWe unit jointly owned by Alcoa and Vectren. This larger unit was placed in operation in 1970.
The Harding Street Station is a 12-unit, 1,196 MW nameplate capacity, gas-, coal, and oil-fired generating station located at 3700 S. Harding St., in Indianapolis, Indiana, U.S. It is owned by AES Indiana, a subsidiary of AES. Completed in 1973, Harding Street Station's tallest chimneys are 565 feet (172 m) in height.
The Boardman Coal Plant was a coal-fired power plant located in Boardman, Oregon. The facility had a nameplate capacity of 550 megawatts (MWs) and is owned by Portland General Electric. In 2010, the plant was the only remaining coal powered plant in Oregon and received much attention from regional media due to its being the largest single source of greenhouse gas emissions in the state with environmental groups such as the Sierra Club calling for its closing.
Talen Energy is an independent power producer founded in 2015. It was formed when the competitive power generation business of PPL Corporation was spun off and immediately combined with competitive generation businesses owned by private equity firm Riverstone Holdings. Following these transactions, PPL shareholders owned 65% of Talen's common stock and affiliates of Riverstone owned 35%. As a condition for FERC approval Talen agreed to divest approximately 1,300 megawatts of generating assets in the PJM Interconnection Region to mitigate FERC's competitiveness concerns. On December 6, 2016, Riverstone Holdings completed the purchase of the remaining 65% of Talen's common stock, making it a privately owned company.
The Afşin-Elbistan power stations are coal-fired power stations in Afşin in Kahramanmaraş Province in Turkey. The area is a sulfur dioxide air pollution hotspot: Air pollution can be trapped by the surrounding mountains, and Greenpeace say that measurements they took nearby in late 2020 show illegal levels of particulates and nitrogen oxides. The Environment Ministry has not released the flue gas measurements.
Çayırhan power station is a 620 MW operational coal fired power station in Turkey in Ankara Province. In 2019 land was expropriated for another lignite mine, to feed the a proposed extension, which was opposed as uneconomic and eventually had its licence revoked.
Hatfield's Ferry Power Station was a 1.7-gigawatt, coal power plant located in Greene County, Pennsylvania. The plant was operated by FirstEnergy. It began operations in 1969 and was shut down in 2013. The three emission stacks were imploded March 4, 2023 at 11:00 AM, and the remaining structure, the boiler house, was imploded on November 17, 2023 at 11:00 AM.
