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Wednesday, 11 October 2006 19:18
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Common bio fuels and their energy content

Approximately energy content in some common bio fuels are indicated in the table below.

  • 1 MJ/kg = 430 Btu/lbm
Bio Fuel Energy content
[MJ/kg]
Charcoal 30
Coal 28
Commercial wastes 16
Domestic refuse 9
Dung, dried 16
Grass, fresh 4
Natural gas (methane) 55
Paper, newspaper 17
Oil 42
Straw, harvested, baled 15
Sugar cane residues 17
Wood, green with 60% moisture 6
Wood, air-dried to 20% moisture 15
Wood, oven-dried to 0% moisture 18

 

Converting values between some common biomass energy units are indicated below:

  • 1 metric tonne bone dry wood fuel = 18 GJ = 5 MWh = 500 litres oil  = 500 m3 natural gas
  • 1 tonne air-dry wood fuel = 3 MWh = 11 GJ
  • 1 cubic metre of wood chip = about 1.0 MWh = 3.6 GJ
  • 1 barrel of oil = 6.1 GJ = 1.7 MWh, = 1.7 m3 wood chip = 0.5 m3 solid bone-dry wood
  • 1 m3 solid bone-dry wood  = 0.68 tonnes 
Last Updated on Friday, 12 December 2008 13:39