### explosive gas:

Propane
* also heats asphalt for highway construction and repairs
  - is known as liquified petroleum gas
  - requires lots of additional air for complete and efficient combustion
* by-product of gasoline, but it can also be extracted from natural gas
  - natural gas processing and petroleum refining
* byproduct of natural gas processing and petroleum refining
  - petroleum refining and natural gas production
* can also result in tailpipe emission benefits similar to a compressed natural gas
  - be either a liquid or a gas
  - improve air quality and readily available fuel
  - leak, posing a risk of fire, explosion, and burn injuries
* clean burning fuel, producing water vapour and carbon dioxide as waste products.
* clean, safe and economical energy source.
* comes from natural gas and petroleum wells.
* comes in bottles or tanks, requiring replacement or refilling at some point
  - disposable tanks
  - high pressure canisters
* common fuel used for cooking and heating.
* contains no aromatic compounds, and produces no benzene and particulate emissions
  - three carbon atoms and eight hydrogen atoms
* creates enormous heat so the burns can be very deep or even lethal.
* derivative of natural gas processing and crude oil refining.
* even reduces emissions in vehicles without emission control devices.
* fine fuel for cars and trucks.
  - at room temperature and ordinary pressure
* has a low flammability range
  - narrow range of flammability when compared with other petroleum products
  - slight dipole moment because it is bent
  - greater freezing speeds making vitrification possible
  - the following vapor pressures
* has the lowest flammability range of any alternative fuel
  - rating of any alternative fuel
* has three carbon atoms chained together
  - lined up in a row
* is actually a commonly used propellant
  - alkane
  - almost one third the cost of petrol
  - also a small industry
  - an explosive gas
  - another gas that can be used as a transportation fuel
  - available in the United States and Europe
* is both flammable and explosive
  - odourless and colourless when produced
  - called gasol
  - cheap, basically safe and easily dispensed
  - chemical compounds
* is clean and more efficient than electric heaters
  - burning, hot and controllable
  - clean, reliable, efficient and affordable
  - colorless, odorless, tasteless, and non-toxic
  - compressed by the compressor into the hot side or high pressure side tubing
  - considered to be a generally safe fuel when stored and handled properly
  - dangerous because it's highly flammable
  - designated as a clean-burning alternative fuel under the Federal Clean Air Act
  - easier to shut off quickly
  - easy to transport and can be used in areas beyond the natural gas mains
  - extracted from natural gasoline or from petroleum
* is heavier than air and can collect initially at low levels
  - is highly volatile
  - sinks
  - methane and ethane
* is more abundant and cheaper than propylene
  - dense than air
  - expensive to run per hour
  - normally a gas, but it's stored in liquid form on a vehicle
* is one of the group of liquefied petroleum gases
  - most versatile sources of energy available
  - such gas
  - preferred when solid lines are used as the pressures are higher
  - probably the ideal fuel for an experimental engine
  - produced from both natural gas processing and crude oil refining
  - safer because it can be better controlled than fossil fuel
  - stored as a liquid under pressure in tanks and cylinders
* is the 'wonder drug' of the energy industry
  - fuel used in hot air ballooning
* is the third member of the alkane series
  - most common vehicular fuel today after gasoline and diesel
* is the third most widely used motor fuel in the world
  - motor fuel, ranking behind gasoline and diesel
* is under a higher pressure and thus uses smaller orifices on the burner jets
  - pressure so that it becomes a liquid and is stored in a pressurized tank
* is used as the fuel for operating the trainers
  - elsewhere
* is used for fuel
  - the cook stove, refrigerator, lights and water heater
  - instead of natural gas on many farms and in rural areas
* keeps longer than gasoline or diesel.
* liquid gas, which means it is in a liquid state when it is compressed
  - in the cylinder, but is burned as a gas
* offers slow evaporative emissions and virtually complete combustion.
* readily expands as the temperature rises.
* relatively safe gas that makes a flame that can reach up into the bag.
* requires a large volume of air to burn properly
  - more pressure than gasoline to become a liquid
* runs cleaner than gasoline, causes less wear on the engine and propane stores much longer.
* safe, efficient, clean-burning fuel, and is recognized as a viable alternative fuel.
* stable and predictable fuel although it is also extremely flammable.
* versatile, clean burning fuel that has many applications in business and in the home.
* works well inside and has very little fumes.