Specific methods to control air pollution
- Created by: scary
- Created on: 08-03-17 13:01
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Clues
- a chamber in the exhaust pipes contain a catalyst such as platinum, which chemically reduces NOx back to nitrogen and oxygen gases (19)
- A fine water spray is used to wash out suspended solids (8)
- a flammale and toxic material that is used to replace CFCs in aerosol propellant (7)
- Effluent gases are forced to rotate in a chamber, suspended solids are thrown to the outside and collected (17)
- Hydrogen sulphide removed from natural gas after extraction to prevent corrosion, sulphur compounds in crude oil removed during distillation, sulphur in coal (iron pyrites) are removed by crushing coal and washing/streaming-iron pyrites settle first (19)
- less persistent than CFCs, but still deplete the ozone (5)
- material used to neutralise incinerated CFCs dissolved in water (4)
- NOx levels in flue gases can be lowered by chemically reducing them (9)
- used to increase efficiency of combustion by helping deliver more air tho the combustion chamber (12)
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