Reducing pollutants

Descrição

Includes wet scrubbing, catalytic converter and electrostatic precipitator :)
Carmen Trinh
Mapa Mental por Carmen Trinh, atualizado more than 1 year ago
Carmen Trinh
Criado por Carmen Trinh aproximadamente 8 anos atrás
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Resumo de Recurso

Reducing pollutants
  1. 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
        2. 2CO + 2NO --> 2C02 + N2
        3. 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
                  1. SO2 + 1/2 O2 + H20 --> H2SO3
                    1. Then we can either add Calcium Hydroxide or Calcium Carbonate
                      1. Calcium Hydroxide
                        1. Sulphuric acid + Calcium Hydroxide --> Calcium Sulphate + Water
                          1. H2S04 + Ca(OH)2 --> CaSO4 + H20
                        2. Calcium Carbonate
                          1. Sulphuric acid + Calcium Carbonate --> Calcium Sulphate + Water + Carbon Dioxide
                            1. H2SO4 + CaCO3 --> CaSO4 + H20 + CO2
                              1. However it does produce CO2 which adds to global warming
                            2. Both of these produce Calcium Sulphate (CaSO4) which can be used as plaster
                  2. 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
                        1. The gasses still carry on out of the chimney

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