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Altering Fuels

Altering Fuels. Demand vs Supply. Some fractions not needed as much as other fractions (Need lots of octane-gasoline) Can alter fractions to meet demands for fractions used more often. Cracking. Break larger hydrocarbons into 2 smaller hydrocarbons.

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Altering Fuels

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  1. Altering Fuels

  2. Demand vs Supply • Some fractions not needed as much as other fractions (Need lots of octane-gasoline) • Can alter fractions to meet demands for fractions used more often.

  3. Cracking • Break larger hydrocarbons into 2 smaller hydrocarbons. • 16 carbon molecule broken into two 8 carbon molecules • C16H34 C8H18 + C8H16 • Always make an alkane + whatever is left over.

  4. Cracking • Cracking Video

  5. Octane Rating

  6. Octane Rating • At the gas pump the number for each grade of gasoline. (87, 89, 92) • The higher the number the higher the octane rating and the better it burns in your car. • Straight chain octane has a lower octane rating. Branched octane burns more efficiently.

  7. Oxygenated Fuels • Additives added to fuels to increase the octane rating. • Gasohol: 10% ethanol and 90 % gasoline works in most engines. • More complete combustion or lower the amount of air pollutants.

  8. Other ways to increase octane rating • 1) Add more branched chain octane. • 2) Add MTHF which can be made from renewable resources.

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