(a) What is destructive distillation of coal?
(b) What are the various products of coal obtained by destructive distillation of coal? Explain them along with their uses.
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What is destructive distillation? definition and meaning ... Process in which a solid material (usually coal or wood) is heated at high temperature out of contact with air to make coke, coal tar, or charcoal. It is called 'destructive' because the chemical composition of the end product is distinctly different from that of the input material. See also fractional distillation.
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When coal is heated in air,it burns to produce mainly carbon dioxide gas.
But when it is strongly heated to about 1000 degree C , in a closed test tube in the absence of air,it breaks down to different components .This process is known as DESTRUCTIVE DISTILLATION OF COAL.
The various products of coal which are obtained after the destructive distillation of coal are;
1. coal tar
2.coal gas
3. coke
Coal tar is a black liquid with an unpleasant smell.it is a mixture of as many as 200 compounds. compounds obtained such as benzene, toluene,phenol etc are used for making medicines , dyes, paints, pesticides etc..
Coal gas is a mixture of methane , carbon monoxide and other gasses. It is a good fuel and has high calorific value. It is used as a good fuel and in chemical and metallurgical processes.
Coke is a tough porous black substance , it is a good fuel with high calorific value and burns with no smoke.it used as an metal industries as an reducing agent.it is also used to make industrially important gasses such as water gas,producer gas.
But when it is strongly heated to about 1000 degree C , in a closed test tube in the absence of air,it breaks down to different components .This process is known as DESTRUCTIVE DISTILLATION OF COAL.
The various products of coal which are obtained after the destructive distillation of coal are;
1. coal tar
2.coal gas
3. coke
Coal tar is a black liquid with an unpleasant smell.it is a mixture of as many as 200 compounds. compounds obtained such as benzene, toluene,phenol etc are used for making medicines , dyes, paints, pesticides etc..
Coal gas is a mixture of methane , carbon monoxide and other gasses. It is a good fuel and has high calorific value. It is used as a good fuel and in chemical and metallurgical processes.
Coke is a tough porous black substance , it is a good fuel with high calorific value and burns with no smoke.it used as an metal industries as an reducing agent.it is also used to make industrially important gasses such as water gas,producer gas.
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