Is sulfur present in coal?


Can sulfur be found in coal?

The sulfur in coal exists in inorganic and organic forms. The inorganic forms are usually sulfides and sulfates, with pyrite the major inorganic sulfur contaminant in most coals. … A number of analytical methods have been developed for approximating the sulfur functional group compositions of coals.

How much sulphur is present in coal?

The total sulfur contents in the coal samples vary from 1.1% to 3.1% with an average of 1.9%, indicating medium sulfur coal (<1.0%, 1.0-3.0%, and >3.0% for low, medium, and high-S coals, respectively) [47] .

What is organic sulphur in coal?

Part of the sulfur in coal is termed organic sulfur, being intimately bound to the organic coal matrix. The chemical nature of this organic sulfur is not well established. During the desulfurization of coal, some of the coarse inorganic sulfur components can be removed.

What is the source of sulphur in coal?


They found that sulfur content in coal is largely controlled by depositional environments. The marine bands are closely related to underlying high sulfur coal, indicating seawater sulfate is a major source of sulfur in high-sulfur coal.

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Is coal and Sulphur are brittle in nature?


What is the formula of coal?

The chemical formula of coal is reported as: C135H96O9NS. Coal is usually taken as 85% carbon based on dry mass.

Why is the presence of sulfur in coal a concern?

When coals are burned, leached and washed, sulfur will be released in the form of sulfide and H2S, which then react with O2, water and other substances to change into vitriol, and in some places it may form acid rain. And they will impact water environment, acidify the soil and do great harm to plants and human health.

Does Indian coal has high sulphur content?

Studies show that the sulphur content in Indian coal is hardly 0.7%, which is not uniformly distributed in the coal but concentrated in the pyritic bands which are visible to the naked eye. The best solution to get rid of sulphur from Indian coal is to wash it.”

How can we reduce the sulphur content of coal?

Sulphur in coal is found in both inorganic and organic forms and sulphates. Inorganic sulphur, in the form of pyrite (FeS2), can be removed from coal relatively easily simply by washing the coal. This method can result in a reduction of 10 – 50% of total sulphur content.

Is coal inorganic or organic?

While coal is naturally occurring, it is organic and thus does not meet the ASTM’s definition of “mineral”.

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What is desulphurization of coal?

Some methods have been applied to coal to remove its inorganic materials from the organic part. … Most of the effective coal desulfurization techniques are based on chemical methods. Main desulfurization methods are chemical desulfurization, leaching, extraction, flotation, oxydesulfuriza- tion and biodesulfurization.

How is Coke superior to coal?

Coke is a better fuel than coal because; –Coke produces more heat on burning than coal. -Coke has a higher calorific value than coal. When equal masses of coke and coal are burnt, coke produces more heat.

Is sulfur is created by the combustion of coal?

Coal is chemically complex fuel. Whenever it is burned, gases are given off and particles of ash, called “fly ash,” are released. The sulfur in coal combines with oxygen to form sulfur dioxide, which can be a major source of air pollution if emitted in large enough quantities.