Which type of coal will have the highest and lowest calorific value and why?
Answer: Due to highest carbon content and fewest impurities, anthracite is the highest grade of coal, whose surface is shining and has the highest calorific value.
Which has the highest calorific value?
Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.
What are 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.
Which coal has highest ash content?
Coking coal– the carbon content is around 43%-86%. It is a type of bituminous coal. Hence, lignite has the least carbon content which means that it has the highest ash content.
Which has lowest calorific value?
Coal has the lowest calorific value.
What is calorific value of LPG?
The specific calorific value of LPG is around 46 MJ/kg or 12.78 kWh/kg depending on the composition of LPG.
Which has more calorific value CNG or LPG?
LPG has high calorific value of 90 to 95 MJ/m3 compared to CNG which has calorific value of as low as 35 to 40 MJ/m3. Thus, LPG is more efficient fuel than biogas, petrol, diesel, kerosene and CNG. … As CNG is lighter than air it distributes faster and proportionately in air.