Advantage and disadvantage of liquid fuel over solid fuel

• Handling of liquid fuel is easy and they require less storage space
• Liquid fuels can be fired easily and maximum temperature is attained in time as compared to solid fuels.
• The solid fuels containing higher of moisture burn with great difficulty.
• The solid fuels leave a large quantity of ash after burning and then disposal of ash becomes a problem. Where as the liquid fuels as very little ash after burning. 
• The combustion of liquid fuel is uniform therefor the change in load can be easily met by controlling the flow of fluid.

Disadvantage:

• They are costly as compared to solid fuels
• They require special type of burners
• In cold climate the oil stored in tanks is to be heated in order to avoid the stoppage of flow.