Fuel

Lower Calorific Value (including Latent Heat at Constant Volume)

Air to Fuel Ratio By Weight For Complete Combustion

Volume Ratio or Specific Volume after Combustion / that before Combustion

Total Energy Released by Combustion at NTP

Type

BTU per lb

Ratio

Ratio

Ft.lb per cub in.

Aromatic Free Petrol

19200

15.05

1.053

48.5

Petrol

18580

14.3

1.038

48.15

Heavy Fuels

Heavy Aromatics

18030

13.8

1.04

48.52

Kerosene

19100

15

1.06

48.91

Paraffin Series

Pentane (Normal)

19740

15.25

1.051

48.7

Hexane (80% pure)

19390

15.2

1.051

48.35

Heptane (97% pure)

19420

15.1

1.056

48.64

Aromatic Series

Benzene (pure)

17460

13.2

1.013

47.51

Toluene (99% pure)

17660

13.4

1.023

47.98

Xylene (91% pure)

17930

13.6

1.03

48.1

Naphthene Series

Cyclohexane (93% pure)

18940

14.7

1.044

48.11

Hexahydrotoluene (80%)

18890

14.7

1.047

48.2

Hexahydroxylene (60%)

18890

14.8

1.054

48.59

Olefines

Cracked Spirit (53% unsat)

18540

14.8

1.054

49.54

Alcohol Group & C

Ethyl Alcohol (98%)

11840

8.9

1.065

47.39

Ethyl Alcohol (95 vol. %)

11130

8.4

1.065

46.86

Methyl Alcohol

10030

6.5

1.06

48.2

Methylated Spirits

10580

8.0

1.064

46.82

Butyl Alcohol

Ether (50% in Petrol)

16830

13.0

1.06

49.2

Carbon Disulph (50%)

10730

10.8

0.98

39.4