Coal to chemical production is in China where coal dependent provinces such as Shanxi are struggling to control its pollution. Refined coal is the product of a coal-upgrading technology that removes moisture and certain pollutants from lower-rank coals such as sub-bituminous and lignite (brown) coals. It is one form of several precombustion treatments and processes for coal that alter coal's characteristics before it is burned. Thermal efficiency improvements are achievable by improved pre-drying (especially relevant with high-moisture fuel such as lignite or biomass).The goals of precombustion coal technologies are to increase efficiency and reduce emissions when the coal is burned. Precombustion
Eddie Brown (dancer) his dances were filled with syncopated steps and complex patterns. The specific style of tap that he performed and later taught to students was called “scientific rhythm.” Brown explained, “You heard all this music and rhythm but couldn’t see where it was coming from.” Eddie Brown’s natural propensity to hear and create intricate rhythms allowed him to make his mark on the world of tap dance: “A good ear ain’t good or bad, but a good ear is what you need. That’s why tap is scientific.” Eddie Brown (dancer) Eddie Brown, was a dancer born in 1918 in Omaha, Nebraska.