What happen when coal is heated in the absence of air?
When coal is heated in the absence of air, it breaks up and provides a large number of organic compounds and some inorganic compounds. The process is known as destructive distillation of coal. In this process coal tar and coal gas can obtained.
What happens when coal is heated in the presence of oxygen?
Carbon dioxide and heat are generated when coal is burnt in the presence of oxygen. … – During this combustion process,the carbon is chemically bonded with the atmospheric oxygen and forms carbon dioxide.
What carbon is produced when coal is strongly heated in the absence of air?
When coal is heated strongly in the absence of air, a gaseous fuel is obtained. This fuel is a mixture of carbon dioxide, methane, and hydrogen. Coke is also a product of such a process.
Which is the purest form of coal?
High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles).
What do you observe when coal is burnt in oxygen?
Burning coal produces large amounts of sulfur dioxide, nitric oxide, smoke, and dust as well as other pollutants that contaminate the air in the form of coal smog.
Does coal burn a lot of air?
In furnaces, it is calculated that nearly, 200 cubic feet of air pass through the fuel for the combustion of one pound of coal. We see by this what an amount of air is necessary to be admitted into rooms during the winter season for the complete combustion of the fuel in stoves and grates.
Is coke obtained from coal tar?
Coal tar: It is obtained as a by-product in the process of making coke. Though its colour is the same as coke, tar is a highly viscous liquid.
Coal And Its By – Products: Coke, Tar And Coal Gas.
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What is the formula of coal gas?