Complete and incomplete combustion

• When is compete combustion used ?

  When there is plenty of oxygen
• Hydrocarbon fuel + oxygen -> carbon dioxide + water
• Example of competee combustion with methane

  Methane + oxygen -> carbon dioxide + water
• What is givrn out with complete combustion

  Energy
• When does incomplete combustion happen

  When theirs not enough oxygen
• Why does incomplete combustion produce more?

  Not enough oxygen to combine with all carbon in fuel
• Incomplete combustion equation

  Hydrocarbon fuel + oxygen-> water + carbon(soot) + carbon monoxide + water
• Dangere of carbon

  • Makes buildings go black
  • Damages lungs
• Complete combustion problem

  • Adds to global warming/climate change
• Pollutants

  • Sulphur dioxide (So2)
  • Nitrogen oxide (Nox)
  • Carbon dioxide
  • Carbon monoxide(Co)
  • Carbon particles(soot)
• Sulphur dioxide production

  • Sulphur is impurity in fuels when reacts with oxygen
  • Can react with clouds to make sulfuric acid
• Nitrogen oxide

  • Formed by Nitrogen and oxygen which react in hot engine then go into clouds to form nitric acid
• Carbond dioxide is made when?

  Hydrocarbon fuels burn(complete combustion)
• When is carbon(particles) and carbon monoxide made?

  During incomplete combustion
• Problems with sulphur dioxide?

  Damages trees, building and lakes and makes acid rain
• Problem with nitrogen oxide

  Acid rain
• Problem with carbon dioxide

  Climate change, global warming
• Carbon monoxide problem?

  Toxic to humans because it's colourless and odourless so csnt detect can csuse nausea, coma or death
• What is hydrogen an alternative fuel too?

  Petrol
• Advantage of hydrogen

  • Renewable
  • Product of cracking
  • Clean
  • No nasty pollutants
• Disadvantages of hydrogen

  • Not widely available
  • Hard to store and transport
  • More Flammable and expensive then petrol