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Coal-upgrading Technology
Refined coal is the product of the coal-upgrading technology that removes moisture and certain pollutants from coal rank, lower-rank coals such as sub-bituminous and lignite (brown) coals, raising their calorific values.http://www.nextgenenergy.org/Portals/Nextgen/docs/TechPapers/NextGen_EEE_Clean_new.pdf NextGen Energy Council Breakthrough Paper Coal refining or upgrading technologies are typically pre-combustion treatments and processes that alter the characteristics of coal before it is burned. Pre-combustion coal-upgrading technologies aim to increase efficiency and reduce emissions when coal is burned. Depending on the situation, pre-combustion technology can be used in place of or as a supplement to post-combustion technologies to control emissions from coal-fueled boilers.http://www.fmifuel.com/pcia/index.html Pre Combustion Innovations Alliance A primary benefit of refined coal is the capacity to reduce the net volume of carbon emissions that is currently emitted from power g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Rank
Coal analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals. These methods are used primarily to determine the suitability of coal for coking, power generation or for iron ore smelting in the manufacture of steel. Chemical properties of coal Coal comes in four main types or ranks: lignite or brown coal, bituminous coal or black coal, anthracite and graphite. Each type of coal has a certain set of physical parameters which are mostly controlled by moisture, volatile content (in terms of aliphatic or aromatic hydrocarbons) and carbon content. Moisture Moisture is an important property of coal, as all coals are mined wet. Groundwater and other extraneous moisture is known as ''adventitious moisture'' and is readily evaporated. Moisture held within the coal itself is known as ''inherent moisture'' and is analysed quantitatively. Moisture may occur in four possible forms within coal: * ''Surface moisture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |