Advantages of solid fuels over the liquid fuels

1. In case of liquid fuels, there is a danger of explosion.
2. Liquids fuels are costlier as compared to solid fuels.
3. Sometimes liquid fuels give unpleasant odours during burning.
4. Liquid fuels require special types of burners for burning.
5. Liquid fuels pose problems in cold climates since the oil stored in the tanks is to be heated in order to avoid the stoppage of oil flow.

Advantages of liquid fuels over the solid fuels

1. The handling of liquid fuels is easier and they require less storage space.
2. The combustion of liquid fuels is uniform.
3. The solid fuels have higher percentage of moisture and consequently they burn with great difficulty. However, liquid fuels can be burnt with a fair degree of ease and attain high temperature very quickly compared to solid fuels.
4. The waste product of solid fuels is a large quantity of ash and its disposal becomes a problem. However, liquid fuels leave no or very little ash after burning.
5. The firing of liquid fuels can be easily controlled. This permits to meet the variation in load demand easily.