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  2. Propane - Wikipedia

    en.wikipedia.org/wiki/Propane

    Unlike propane, if a spill occurs, CNG will evaporate and dissipate because it is lighter than air. Propane is much more commonly used to fuel vehicles than is natural gas, because that equipment costs less. Propane requires just 1,220 kilopascals (177 psi) of pressure to keep it liquid at 37.8 °C (100 °F). [50]

  3. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Only certain lighter than air gases are suitable as lifting gases. Dry air has a density of about 1.29 g/L (gram per liter) at standard conditions for ...

  4. Liquefied petroleum gas - Wikipedia

    en.wikipedia.org/wiki/Liquefied_petroleum_gas

    LPG is composed mainly of propane and butane, while natural gas is composed of the lighter methane and ethane. LPG, vaporised and at atmospheric pressure, has a higher calorific value (46 MJ/m 3 equivalent to 12.8 kWh/m 3) than natural gas (methane) (38 MJ/m 3 equivalent to 10.6 kWh/m 3), which means that LPG cannot simply be substituted for ...

  5. Not your imagination: Why your propane tank actually is ... - AOL

    www.aol.com/2009/05/26/not-your-imagination-why...

    You no longer have to wonder why your grill is running out of gas a bit sooner than it used to.Following the lead of ice cream makers who decided consumers would rather pay the same and get less ...

  6. Alternative fuel - Wikipedia

    en.wikipedia.org/wiki/Alternative_fuel

    Propane is a hydrocarbon fuel and is a member of the natural gas family. ... Natural gas and hydrogen are both lighter than air and can be mixed together. [67]

  7. Liquid fuel - Wikipedia

    en.wikipedia.org/wiki/Liquid_fuel

    It offers many of the advantages of compressed natural gas (CNG), but does not burn as cleanly, is denser than air and is much more easily compressed. Commonly used for cooking and space heating, LP gas and compressed propane are seeing increased use in motorized vehicles; propane is the third most commonly used motor fuel globally.

  8. Methane - Wikipedia

    en.wikipedia.org/wiki/Methane

    While leaks from a refrigerated liquid container are initially heavier than air due to the increased density of the cold gas, the gas at ambient temperature is lighter than air. Gas pipelines distribute large amounts of natural gas, of which methane is the principal component.

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