Constituents of Natural Gas
Constituents
- Methane CH4 - 90%
- Ethane C2H6 - 5.3%
- Propane C3H8 - 1%
- Butane C4H10 - 0.4%
- Nitrogen N2 - 2.7%
- Carbon Dioxide CO2 - 0.6%
Natural Gas prior to combustion is not poisonous
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Calorific Value
Specific Gravity of Natural Gas is 0.6 - lighter than air
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Wobbe Number
- Wobbe Number = CV/√SG
- Heat output from the burner depends on:
- Calorific Value
- Specific Gravity
- Injector size
- Gas Pressure
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Gas Families
- Family 1 - manufactured gas
- Family 2 - natural gas
- Family 3 - liquid petroleum gas
Flammability Limits - natural gas burns with 5 to 15% gas in air
Flame Speed - natural gas burns speed is 0.36m/sec
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