coal-rank classification

См. также в других словарях:

• Coal rank —   The classification of coals according to their degree of progressive alteration from lignite to anthracite. In the United States, the standard ranks of coal include lignite, subbituminous coal, bituminous coal, and anthracite and are based on… …   Energy terms

• coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …   Universalium

• coal classification — ▪ process  any of various ways in which coal is grouped. Most classifications are based on the results of chemical analyses and physical tests, but some are more empirical in nature. Coal classifications are important because they provide… …   Universalium

• coal utilization — Introduction        combustion of coal or its conversion into useful solid, gaseous, and liquid products. By far the most important use of coal is in combustion, mainly to provide heat to the boilers of electric power plants. Metallurgical coke… …   Universalium

• Coal Classification —   In the United States, coals are classified by rank progressively from lignite (least carbonaceous) to anthracite (most carbonaceous) based on the proximate analyses of various properties (fixed carbon, volatile matter, heating value, and… …   Energy terms

• rank — n of coal, a classification designation that indicates the degree of metamorphism, or progressive alteration, from lignite to anthracite. • anthracite anthracitic class bituminous class high volatile A bituminous coal high volatile B bituminous… …   Coke&Coal Terminology

• Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …   Wikipedia

• coal — n a brown to black combustible sedimentary rock (in the geological sense) composed principally of consolidated and chemically altered plant remains. DISCUSSION Conditions required for formation of coal are believed to include accumulation of… …   Coke&Coal Terminology

• rank — rank1 rankless, adj. /rangk/, n. 1. a number of persons forming a separate class in a social hierarchy or in any graded body. 2. a social or official position or standing, as in the armed forces: the rank of captain. 3. high position or station… …   Universalium

• rank — I [[t]ræŋk[/t]] n. 1) a social or official position or standing, as in the armed forces: the rank of captain[/ex] 2) high position or station: a person of rank[/ex] 3) relative position or standing: a writer of the first rank[/ex] 4) a row or… …   From formal English to slang

• subbituminous coal — Dark brown to black coal, intermediate in rank between lignite and bituminous coal. It contains less water and is harder than lignite, making it easier to transport, store, and use. It has lower heating value than bituminous coal, but its sulfur… …   Universalium