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High-volatile coal, in contrast, usually produces anywhere from 18 to 29 million BTUs per ton.
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What is the most common variety of coal?
Probably bituminous, the "middle grade" of coal. Lowest is lignite, which is usually only used in underdeveloped countries as it has low heat output and high pollution. Above bituminous is anthracite, an excellent, very hard (and very expensive) coal. When you ask most people to visualize a lump of coa in their mind, ninety to ninety-five percent of them will visualize bituminous.
Is bituminous coal formed from anthracite coal?
Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but of poorer quality than anthracite. Formation is usually the result of high pressure being exerted on lignite.
What is a very hard rock that burns with a high heat and smoke a metamorphic rock formed from coal?
Anthracite, which is metamorphosed bituminous coal.
Why is coke preferred over coal for burning?
Coke, often made from bituminous coal refuse, is formed from burning off volatile components. That leaves solid fuel that burns longer and hotter than coal.Anthracite (hard) coal burns the hottest and cleanest, but this coal is in shorter supply because it takes longest to form.Bituminous (soft) coal has variable amounts of volatile components (low, medium, high) and burns 'dirty'. But it provides long, fairly even burning.Factories could and did use bituminous coal. But burning coal refuse to make coal rescued the coal while getting rid of gunk and impurities. Steel mills, which needed high, even, and longer-lasting burns for steel production, required coke.For coal companies, mining and processing of "coal and coke" increased revenues from all grades of coal. At one point, Fayette County and Washington County both in SW Pennsylvania were dotted with "beehive" coke ovens used to burn off coal's impurities.
What is the burning point of coal and coke?
Coke is a solid carbonaceous residue derived from low-ash, low-sulfur bituminous coal from which the volatile constituents are driven off by baking in an oven without oxygen at temperatures as high as 1,000 °C (1,832 °F) so that the fixed carbon and residual ash are fused together.
What is coke made out of?
carbonated water,high fructose corn syrup,caramel colorm,phosphoricacid,natural flavors caffeine
Where coal is found in Pakistan?
Coal is found in Baluchistan, Upper Punjab and in Thar Desert. Thar desert holds the largest coal reserves in Pakistan and this coal is also known as Thar Coal.
What are the compositions of coal?
Coal is classified according to its heating value and according to its relative content of elemental carbon. For example, anthracite contains the highest proportion of pure carbon (about 86%-98%) and has the highest heat value-13,500-15,600 Btu/lb (British thermal units per pound)-of all forms of coal. Bituminous coal generally has lower concentrations of pure carbon (from 46% to 86%) and lower heat values (8,300-15,600 Btu/lb). Bituminous coals are often sub-divided on the basis of their heat value, being classified as low, medium, and high volatile bituminous and sub-bituminous. Lignite, the poorest of the true coals in terms of heat value (5,500-8,300 Btu/lb) generally contains about 46%-60% pure carbon. All forms of coal also contain other elements present in living organisms, such as sulfur and nitrogen, that are very low in absolute numbers, but that have important environmental consequences when coals are used as fuels.
What are the different names of coal?
The names for the different types of coal depends on the organic content. The coal with the lowest percentage of organic matter is anthracite. (around 10 % organics) Then comes steam coal, bituminous coal. (around 20 %) Lignite is a form of coal with high organic content (around 50 %) Peat is a coal precursor (half way to being coal) (More than 50 %)
How is coal created and where does coal it come from?
coal is created by the deposition and compaction of huge plant(organic) material deposited into a basin,with the increasing depth the high rank of coal is formed. The order is:- peat>lignite>bituminous>anthracite Peat is formed at shallow depth and on moving downward anthracite is formed at greater depth.
Why are there social and political problems associated with fossil fuels?
The US has one of the richest beds of fossil fuels, namely bituminous coal. The geological region called The Pittsburgh Coal Seam extends through many States, including PA, WVA, OH, IN, ILL, and KY. Bituminous coal is a cheap fuel that burns hot. It was used exclusively in home / business heating (coal furnaces), and coal or coke (made from coal) fueled Mills and Factories. The US also has a seam of anthracite coal, which burns less hot and is less preferred over bituminous coal.However, burning coal is dirty. It produces air pollution that contains numerous chemicals. The coal dust from burning the coal can exist in homes/buildings for a century or longer. Coal dust leads to or aggravates many lung diseases. It is a risk to public health, as well as the health of the planet. Social-health concerns often conflict with political concerns, especially in States and Districts that have a high percent of coal miners. Workers risk losing their jobs if society turns away from coal as fuel.
Short note on different varieties of coal?
There are four types of coal as under:Lignite coalUsed almost exclusively for electric power generation lignite is a young type of coal. Lignite is brownish black, has a high moisture content (up to 45 %), and a high suphur content. Lignite is more like soil than a rock and tends to disintegrate when exposed to the weather. Lignite is also called brown coal. Lignite has a colorific value of less than 5 kw/kg approximately.Subbituminous coalSubbituminous coal is also called black lignite. Subbituminous coal black and contains 20-30 % moisture. Subbituminous coal is used for generating electricity and space heating. Subbitumnious coal has calorific values ranging from 5 - 6.8 kW/kG approximately.Bituminous coalBituminous coal is a soft, dense, black coal. Bituminous coal often has bands of bright and dull material in it. Bituminous coal is the most common coal and has a moisture content less than 20 %. Bituminous coal is used for generating electricity, making coke, and space heating.Bituminous coal has calorific values ranging from 6.8 - 9 kW/kG approximately.Anthracite coalOften referred to as hard coal, anthracite is hard, black and lustrous. Anthracite is low in suplhur and high in carbon. It is the highest rank of coal. moisture content generally is less than 15 %.Anthracite has a calorfific values of around 9 kW/kG or above.
