Coal and carbon is one thing, what is the difference?
Coal formation:On the surface under normal temperature and pressure, by the accumulation of stagnant water in the plant remains in the mud or carbonizing SAPROFICATION, into peat or muck or peat; sapropel buried after falling down to the basement of the basin due to deep underground, the diagenesis into lignite; when the temperature and the pressure gradually increased, then transformed into bituminous coal to anthracite metamorphism. The process of peat formation is the process of the transformation of the remains of higher plants into peat in the swamp. The role of decay is the process by which the remains of the lower organisms change from the biochemical changes to the humus. Mud is a kind of silt rich in water and asphaltene.
The way:Coal is an important energy source and an important raw material for metallurgical and chemical industry. It is mainly used for combustion, coking, gasification, low temperature carbonization, hydrogenation liquefaction and so on. First combustion. Coal is an important energy resource of mankind, no coal can be used as industrial and civilian fuel. Coking coal. In the coal carbonization furnace, air heating, organic matter in coal with the increase of temperature is gradually decomposed, the volatile substances in gaseous or vapor state to escape, as coke oven gas and coal tar, and non volatile solid residues for coke. Coke oven gas is a kind of fuel and an important chemical raw material. Coal tar can be used in the production of chemical fertilizers, pesticides, synthetic fiber, synthetic rubber, paints, dyes, pharmaceuticals, explosives, etc.. Coke is mainly used in blast furnace ironmaking and casting, but also can be used to produce nitrogen fertilizer, calcium carbide. Calcium carbide is plastic, synthetic fiber, synthetic rubber and other synthetic chemical products. Gasification. Gasification refers to the conversion of industrial or civil fuel as well as chemical synthesis of raw materials. Low temperature carbonization. Low temperature tar and low temperature coke oven gas can be prepared by low temperature carbonization of coal or oil shale at the temperature of 550 DEG C. Hydrogenation liquefaction. The coal, the catalyst and the heavy oil are mixed together, and the organic matter in the coal is destroyed at high temperature and high pressure, and the hydrogen is converted into low molecular liquid and gaseous products. The raw materials of coal liquefaction by hydrogenation of lignite, long flame coal and gas coal.
Chemical composition:The organic matter in coal is high polymer complex organic compounds, mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus and other elements, and more than three carbon, hydrogen and oxygen and total organic matter occupies 95%; inorganic matter in coal also contains carbon, hydrogen, oxygen, sulfur and other elements of a few. Carbon is the most important component in coal, and its content increases with the degree of coalification. The content of carbon in peat is 50% ~ 60%, the lignite is from 60% to 70%, the bituminous coal is from 74% to 92%, and the anthracite is from 90% to 98%. Sulfur in coal is the most harmful chemical component. Coal combustion, in which sulfur generated SO2, corrosion of metal equipment, pollution of the environment. The content of sulfur in coal can be divided into 5 levels: high, greater than 4%; sulfur rich coal, from 2.5% to 4%; sulfur in coal, from 1.5% to 2.5%; low sulfur coal is 1% ~ 1.5%; ultra low sulfur coal, less than or equal to 1%. Sulfur in coal can be divided into two categories: organic sulfur and inorganic sulfur.
coalA solid, flammable organic rock consisting mainly of the remains of a plant that has been chemically altered, buried and then transformed by geological processes. Commonly known as coal.
