What is the chemical composition of bituminous coal

Many grades based on chemical composition and ultimate us are used to. As such bituminous and sub-bituminous coals produce approximately the same amount of pollution per kilowatt of electricity generated.

Highest proportions of carbon occur in the inertinite macerals especially fusinite and secretinite formerly resino-sclerotinite as well as in sporinite.

What is the chemical composition of bituminous coal. In time material that had been plants became coal. Coals are classified into three main ranks or types. Lignite bituminous coal and anthracite.

These classifications are based on the amount of carbon oxygen and hydrogen present in the coal. Coal is defined as a readily combustible rock containing more than 50 by weight of carbon. Coals other constituents include hydrogen oxygen nitrogen ash and.

Bituminous coal in Indiana contains between 69 86 carbon by weight Sub-bituminous coal contains less carbon more water is a less efficient source of heat Lignite coal or brown coal is a very soft coal that contains up to 70 water by weight. Emits more pollution than other coals. The chemical composition of the organic matter in the principal macerals of high-volatile bituminous coals from the Gunnedah Basin New South Wales Rv max of telocollinite between 06 and 11 has been evaluated from polished section specimens using an electron microprobe technique.

Highest proportions of carbon occur in the inertinite macerals especially fusinite and secretinite formerly resino-sclerotinite as well as in sporinite. Lowest proportions of carbon. The high content of CaO is benefit to desulfurization activity of the coal because SO2 and CaO can react and form CaSO 4 during the retorting and combustion process of bituminous coal which is consistent with the fact that sulfur content of semi-coke is much higher than that of tar Table 4.

Composition of bituminous coal ash. Bituminous coal is a middle rank coal between subbituminous and anthracite. Bituminous coal usually has a high heating Btu value and is used in electricity generation and steel making in the United States.

Bituminous coal is blocky and appears shiny and smooth when you first see it but look closer and you might see it has thin alternating shiny and dull layers. When it comes to the petrographic composition of coal from the No. 3852 seam the mineral matter content is 14.

The share of macerals from the vitrinite group is 610 while in the case of the liptinite and inertinite groups amounts to 174 and 202 respec-. Volatile matter is an index of the gaseous fuels presence. The volatile matters are the methane hydrocarbons hydrogen carbon monoxide and incombustible gases like carbon dioxide and nitrogen found in coal.

The typical range of volatile matter is 20 to 35. Bituminous coal is been named so because of the presence of a tar-like and gluey type substance which is known as bitumen or asphalt. Bituminous coals are composed of three major Maceral groups which in the common terminology are known as.

The glassy material in most bituminous coal is vitrinite composed of macerals derived primarily from woody plant tissue. Because of its relatively high heat value and low less than 3 percent moisture content its ease of transportation and storage and its abundance bituminous coal has the broadest range of commercial uses among the coals. Anthracite semi-anthracite coal bituminous coal Chemical composition.

Carbon 77 ash 6-16 Trace elements. Sulfur 023-12 silica oxide 22-54 alumina 2 ferric oxide. Coal is generally divided into anthracite hard coal and bituminous soft coal.

Many grades based on chemical composition and ultimate us are used to. Bituminous coal combustion releases more pollution into the air than sub-bituminous coal combustion but due to its greater heat content less of the fuel is required to produce electricity. As such bituminous and sub-bituminous coals produce approximately the same amount of pollution per kilowatt of electricity generated.

Bituminous coal has a composition of about 844 carbon 54 hydrogen 67 oxygen 17 nitrogen and 18 sulfur on a weight basis. This implies that chemical processes during coalification must remove most of the oxygen and much of the hydrogen leaving carbon a. Composition of Bitumen 1 Tar.

Coal tar is a brown or dark black liquid of high viscosity which smells of naphthalene and aromatic. It is the liquid by-product of the distillation of coal to make coke. The gaseous by-product of this.

It is obtained by the. Sub-bituminous coal is noncoking and contains less sulfur but more moisture approximately 10 to 45 percent and volatile matter up to 45 percent than other bituminous coal types. It has 35 to 45 percent carbon content and its ash content ranges up to 10 percent.

The coals sulfur content is generally less than 2 percent by weight. Nitrogen makes up approximately 05 to 2 percent of the coals weight. Coal - Coal - Structure and properties of coal.

The plant material from which coal is derived is composed of a complex mixture of organic compounds including cellulose lignin fats waxes and tannins. As peat formation and coalification proceed these compounds which have more or less open structures are broken down and new compoundsprimarily aromatic benzenelike and hydroaromatic. The effects of chemical structures on n-alkane yields and their relative functional groups is scarce.

In our case the chemical structural evolution of bituminous coal during gold-tube flash pyrolysis at two different heating rates has been obtained by Py-GC and FTIR. FTIR parameters of the coal residues AlOX AlC C C-factor ratio A-factor.