Tag: study of coal

Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.
Coal gas contains a variety of calorific gases including hydrogen, carbon monoxide, methane and volatile hydrocarbons together with small quantities of non-calorific gases such as carbon dioxide and nitrogen.

Cokes are generally available in four different forms. That is honeycomb, needle, sponge and shot coke.

The coke which contain less quantity of ash, sulfur and high quantity of carbon is called as pure coke.

Carbonisation is the procedure in which carbon dioxide is added to the coke to make it smokeless.

Combustion reaction of coke is a exothermic reaction in which heat is removed from the reaction mixture.

Naphthalene which is used to repel moths and other insects is obtained from coal tar.
Coal tar is a thick black liquid. It is obtained from the distillation of bituminous coal. It contains benzene, naphthalene, phenols, aniline, and many other organic chemicals.

Coal is a fossil fuel that forms when dead plant matter is converted into peat, which in turn is converted into lignite, then sub-bituminous coal, after that bituminous coal, and lastly anthracite.The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel.

A non-renewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil, natural gas and coal are considered nonrenewable resources in that their use is not sustainable because their formation takes billions of years.

When heated in air, coal burns and produces mainly carbon dioxide gas.

False.
Calorific value of coal is higher than that of wood.