- Definition: Clean Coal Technology
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A broad term used to describe a means to utilize coal in the production of electricity with a lower emissions profile than traditional production. The lowered emissions include sulfur dioxide (SO2), nitrous oxide (NOx), mercury, and particulate matter. In some vernaculars, it may include the reduction or actual capture and sequestration of carbon dioxide (CO2), which some believe contributes to global climate change. Lower emissions can be achieved through pollution control technology, gasification of the coal to convert the coal to a synthetic gas, or through beneficiating the coal to improve the heat content and lower the emissions. Pollution control technology includes a suite of items to control SO2, NOx, mercury, and particulate matter. Integrated Gasification Combined Cycle (IGCC) is the means to convert coal to synthetic gas and then utilize this synthetic gas to generate electricity in a combined cycle power plant. Beneficiated coal takes raw coal of low heat content and raises its heat content and lowers its emissions content when ultimately utilized in a coal plant. CO2 capture and sequestration is being explored at existing and new coal-fired plants. At this point, there is no commercially and economically feasible means to remove CO2 from coal-fired power plants. Much exploration of such technology is under way at traditional coal-fired power plants to try and capture and sequester CO2 in a large and economic scale. In addition, there is the FutureGen Initiative, which is the Department of Energy’s joint public-private project to design and build a large-scale prototype plant to produce electricity and hydrogen from coal with no carbon or other emissions by mid-next decade.
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