crude oil and fuels

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  • Crude oil and fuels
    • Fuels from crude oil
      • Crude oil is a mixture of many different compunds
      • Distillation can be used to sepearte mixtures of liquids
      • Most of the compounds in crude oil are hydrocarbons- they contain only hydrogen and crabon.
      • Alkanes are saturated hydrocarbons. They contain as many hydrogen atoms as possible in their molecules
    • Fractonal distillation
      • Crude oil is seperated into fractions using fractional distillation
      • The properties of each fraction depend on the size of the hydrocarbon molecules
      • Fractions with lower boiling points are less viscous and burn more easily
    • Burning fuels
      • Burnimg hydrocarbons in plenty of air produces carbon dioxide and water
      • Burning hydrocarbons in limited supply of air may produce sulfur dioxide
      • Any sulfur compounds in the fuel burn to produce sulfur dioxide
      • Oxides of nitrogen can be formed when fuels burn under extreme conditions
    • Cleaner fuels
      • Many scientists believe that carbon dioxide from burning fuels causes global warming
      • Sulfur dioxide and nitrogen oxides cause acid rain
      • Particualtes cause global dimming
      • Pollutants can be removed from waste gases after the fuel is burned
      • Sulfur can be removed from fuels before they are burned so less sulfur dioxide is given off
    • Alternative fuels
      • Biodiesel can be made from vegetable oils
      • Biofuels are a renewable source of energy that could be used instead of fossil fules
      • There are advantages and disadvantages of using biodiesel
      • Ethanol made form sugar is a biofuel
      • Hydrogen is a potential fuel for the future
  • Alternative fuels
    • Biodiesel can be made from vegetable oils
    • Biofuels are a renewable source of energy that could be used instead of fossil fules
    • There are advantages and disadvantages of using biodiesel
    • Ethanol made form sugar is a biofuel
    • Hydrogen is a potential fuel for the future

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