Reducing pollutants

Catalytic converter
1. Hot car engines produce bad gasses such as Nitrogen dioxide and Carbon Monoxide
  1. Then in the catalytic converter they get processed and come out as Nitrogen and Carbon Dioxide
    1. However Carbon dioxide still adds to global warming
2. Only in expensive cars as is made of raw metals
  1. Therefore it does help, but not very much as there are more cheaper cars than there are expensive cars
3. 2CO + 2NO --> 2C02 + N2
Wet Scrubbing
1. Used to remove sulpher
  1. We can remove sulphur before we burn coal but that's expensive
    1. So we use wet scrubbing instead
      1. First water is added to get a harmless sulphuric acid
        SO2 + 1/2 O2 + H20 --> H2SO3
        Then we can either add Calcium Hydroxide or Calcium Carbonate
        Calcium Hydroxide
        Sulphuric acid + Calcium Hydroxide --> Calcium Sulphate + Water
        H2S04 + Ca(OH)2 --> CaSO4 + H20
        Calcium Carbonate
        Sulphuric acid + Calcium Carbonate --> Calcium Sulphate + Water + Carbon Dioxide
        H2SO4 + CaCO3 --> CaSO4 + H20 + CO2
        However it does produce CO2 which adds to global warming
        Both of these produce Calcium Sulphate (CaSO4) which can be used as plaster
Electrostatic Precipitator
1. Used to remove particulates (C)
  1. As particulates go up, they are given a negative charge
    1. They carry on up, then becoming attracted to positively charged plates
      1. Because of this, they drop into a container which then disposes of them
2. Usually found in chimneys
3. The gasses still carry on out of the chimney

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Reducing pollutants

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