What lowers the calorific value of coal?

Decrease in carbon and hydrogen percentage results in decrease in gross calorific value of coal from 4578 to 2751 kcal/kg, fixed carbon content from 35.6% to 19.9%, with an increase in ash percentage from 29.2% to 46.6%.

Which fuel has the lowest calorific value?

Coal has the lowest calorific value.

What is the calorific value of coal?

Typical calorific values of fuels

Fuel Net CV by mass Energy density by volume
House coal 27-31 6,400-7,300
Anthracite 33 10,100
Heating oil 42.5 10,000
Natural gas (NTP) 38.1 9.8

What is the fuel value of coal?

3500 kcal/kg
Fuel Calorific Values

Natural gas 12500 kcal/kg
Propane-butane 11950 kcal/kg
Disel 10000 kcal/kg
Fuel oil 9520 kcal/kg
Brown coal 3500 kcal/kg

Which gas has 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 is calorific value of diesel?

roughly 45.5 MJ/kg
The calorific value of diesel fuel is roughly 45.5 MJ/kg (megajoules per kilogram), slightly lower than petrol which is 45.8 MJ/kg. However, diesel fuel is denser than petrol and contains about 15% more energy by volume (roughly 36.9 MJ/litre compared to 33.7 MJ/litre).

Which fuel has highest calorific value?

Hence, hydrogen has the highest calorific value….Fuels with calorific values:

  • Hydrogen: 150 KJ/g.
  • Methane: 55 KJ/g.
  • LPG: 50 KJ/g.
  • Kerosene oil:48 KJ/g.
  • Charcoal: 33 KJ/g.
  • Wood: 17 KJ/g.

Which fuel causes least pollution?

Natural gas is the cleanest fuel and causes the least pollution when burnt compared to petrol, diesel and coal.

Which Wood has highest calorific value?

The experimental values of the highest calorific value in terms of BDH are (mJ/kg): 19.40… 21.20 – for wood with natural bark content; 18.9…23.6 – for bark; 20.8±0,5 – for coniferous species (including pine – 20.90±0.30); 20.0±0.7 – for hardwood (including alder and aspen – 19.90±1.00; for birch bark – 23.6).

What is heating value of fuel?

The heat value of a fuel is the amount of heat released during its combustion. Also referred to as energy or calorific value, heat value is a measure of a fuel’s energy density, and is expressed in energy (joules) per specified amount (e.g. kilograms).

What is calorific value?

Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions. It is also called calorific power. The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.

Which has highest calorific value?