Question

Among the following, whose calorific value is the highest?
1. Biogas
2. Hydrogen
3. Methane
4. LPG

Answer 1

Correct Answer - Option 2 : Hydrogen

The correct answer is Hydrogen.

• Hydrogen has the highest calorific value.

• The calorific value or heating value or energy value of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it.
  • The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions.
  • There are two kinds of the heat of combustion, called higher and lower heating values.
  • The calorific values are conventionally measured with a bomb calorimeter.
  • The calorific value of Hydrogen is 120-142 MJ/kg.

• The calorific value of biogas is about 6 kWh/m^3, this corresponds to about half a liter of diesel oil.
• The calorific value of LPG is 11,900 Kcal/Kg.
• The calorific value of Methane is 13284 Kcal/Kg.