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How are propane and butane used as fuels?
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hydrocarbon
Structures assumed by hydrogen (H) and carbon (C) molecules in four common hydrocarbon compounds.
Propane and butane are primarily utilized as fuels in the form of liquefied petroleum gas (LPG). Because they are gases at atmospheric pressure but possess low boiling points, they are easily liquefied under pressure, allowing them to be stored and transported in cylinders and tanks.123
In domestic and industrial settings, these hydrocarbons serve several key functions:
- Heating and Cooking: LPG is widely used for central heating systems, gas fireplaces, portable heaters, and as fuel for gas cooktops, ovens, and barbecue grills. In many regions, it is also used for water heating.1
- Internal Combustion: They are used as fuel for internal-combustion engines and backup generators.12
- Gasoline Blending: n-butane is specifically added to gasoline to enhance its volatility. Additionally, butane can be transformed into isobutane to create high-octane components for fuel.3
Unlike some other fuels, LPG can be stored nearly indefinitely without degradation, making it a reliable energy source for various applications.1