Natural Gas

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					Natural Gas

    Beth Baker
    IB Physics
         Where it comes from…
 Natural gas is a fossil fuel
 Natural gas is found after marine life has died
  and been put under great pressure and turns to
  natural gas.
                 Energy Density

 Amount of potential energy stored in a fuel per unit
 Higher the energy density, the more energy may be
  stored or transported for the same amount of mass.
 Natural Gas has an energy density of 39 MJ/m^3
 Natural Gas has a higher energy density than things like
  black coal, which allows it to go farther and be more
 Liquefied Natural Gas (LNG) is the gas compressed into
  a liquid form so it can be transported easier and
  consumes less volume.
 Low density of gas makes it more expensive to transport
  than oil.
 A section of pipe in oil service can hold 15 times more
  energy than when used to transport high pressure gas.
 Gas pipelines must be larger in diameter, and pipelines
  can’t always be used because of location between
  producers and consumers.
 Transported by ship, barge, truck, rail, and pipeline.
              Proportions of World Use
 North America is one of the leading consumer of Natural Gas-
  -- the U.S. consumes a significant amount more than it
 Canada provides a lot of the natural gas for the U.S.
 Mexico could become a significant source.
 U.S. imports LNG from Algeria.
 Other key producers/consumers:
  France, Spain, Korea, Belgium, Italy, Taiwan, and Japan.
 Advantages:
 Natural Gas is said to be the most important energy source for the future.
 Since there is an abundance and it’s better for the environment, the need for
  natural gas for energy in the U.S. is predicted to keep growing.
 Natural Gas is extremely efficient because it loses very little energy when
  being put to use.
 Cleanest burning fossil fuel, very few byproducts are emitted in to air as
 Eliminates oil spills, soil contamination, and expensive environmental clean
 Disadvantages:
 Natural gas uses complex underground pipeline systems that are hard to
  maintain– making it expensive.
 They are very combustible and methane explosions are possible.
 The extraction can be a disadvantage because the gas is creating pressure in
  the ground, supporting the soil, then being extracted can create cavities–
  which can cause the ground to sink.
 Natural gas is very toxic when breathing it indoor.

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