Gross Combustion Value for some common Materials

Gross combustion values for some common materials - carbon, methane, ethylene and more - values in Btu/lb

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Gross combustion values for some common materials can be found in the table below:

Material Gross Combustion Value
(Btu/lb)
Carbon C 14,093
Hydrogen H2 61,095
Carbon Monoxide CO 4,347
Methane CH4 23,875
Ethane C2H4 22,323
Propane C3H8 21,669
n-Butane C4H10 21,321
Isobutane C4H10 21,271
n-Pentane C5H12 21,095
Isopentane C5H12 21,047
Neopentane C5H12 20,978
n-Hexane C6H14 20,966
Ethylene C2H4 21,636
Propylene C3H6 21,048
n-Butene C4H8 20,854
Isobutene C4H8 20,737
n-Pentene C5H10 20,720
Benzene C6H6 18,184
Toluene C7H8 18,501
Xylene C8H10 18,651
Acetylene C2H2 21,502
Naphthalene C10H8 17,303
Methyl alcohol CH3OH 10,258
Ethyl alcohol C2H5OH 13,161
Ammonia NH3 9,667
  • 1 kJ/kg = 0.4299 Btu/ lbm = 0.23884 kcal/kg
  • 1 Btu/lbm = 2.326 kJ/kg = 1.8 kcal/kg

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