First Look at Carbon Capture and Storage in a West Virginia Coal-Fired Power Plant [Slide Show]
The world's first power facility to capture and store a portion of its carbon dioxide has begun operating in Appalachia
First Look at Carbon Capture and Storage in a West Virginia Coal-Fired Power Plant [Slide Show]
- CLEANER COAL?: Capturing CO2 from all that coal burning is vital to any efforts to combat climate change, according to the U.N. Intergovernmental Panel on Climate Change and other experts. The unit at Mountaineer is one of at least 14 projects around the world aiming to make carbon capture and storage technologically and economically viable... © David Biello
- COAL POWER: The U.S. and China together burn more than four billion metric tons of coal annually, and Mountaineer consumes 3.5 million metric tons in a typical year—10 to 12 barge loads a day—some of which is transported by train from as far away as the Powder River Basin in Wyoming... © David Biello
- DEEP STORAGE: The captured CO2 is stored more than two and a half kilometers underground in the pores between the grains of rock that make up sandstone, which is usually filled with brine. Intervening layers of shale and limestone should also keep the CO2 from leaking back to the surface... Courtesy of AEP / Battelle
- CARBON CAPTURE: The cooled flue gas enters the central, wide column (pictured here) at Mountaineer. Inside the tall tank, a slurry of ammonium carbonate—better known as baker's ammonia—pulls 90 percent or more of the CO2 out of the flue gas by chemically reacting to form ammonium bicarbonate... © David Biello
- COLD CAPTURE: Flue gas from coal burning is cooled from roughly 150 degrees Celsius out of the boiler to 55 degrees C after going through various cleaning processes. It is further cooled to less than 20 degrees C before entering the carbon-capture unit—as laid out here for a carbon-capture demonstration at the Pleasant Prairie power plant in Wisconsin... Courtesy of Alstom
- COMBATING CLIMATE CHANGE: The carbon-capture unit, dwarfed by the smokestack and cooling tower, employs Alstom's "chilled ammonia" technology to remove more than 90 percent of the carbon dioxide from 20 megawatt's worth of emissions—or 1.5 percent of the plant's total CO2 output... Courtesy of Alstom