Energy content of fuels

 

Fuel

 Energy Content MJ/kg

Energy Density MJ/m^3

U-235 in Fission Reactor

88,250,00

1,500,000,000

Hydrogen (STP)

114.0

10

Hydrogen (liquid, with tank)

10

10

Hydrogen (compressed gas, with tank)

5

5.6

LPG Propane

49.6

25.3

Gasoline

46.9

34.6

Diesel

45.8

38.7

Plastic (polyethylene)

42.2

42.6

Crude Oil

42.0-43.0

37

Plant Oil (Bio-Diesel)

38-42

~33

Butter

30

27

Ethanol

29.6

22

Coal

22-32

~72

Natural Gas (STP)

20.0

0.03

Cereal Grains, Bread

~15

~26

Air Dried Wood

12-15

2-3

Straw, dung

12-15

2-3

Meat

5-10

5-10

Potatoes

4

6.4

Beer

1.8

1.8

Carbon Fiber Flywheel

0.8

0.1

Fruit and Vegetables

0.6-1.8

0.6-1.8

Lithium Batteries

0.5-2.5

1.0

Compressed air, with tank

0.1

0.1

Lead Batteries

0.1

0.15

Table 6.1 Energy content per weight and per volume for various substances [1].