Unit 3: Atmospheric Pollution - Controls 1
- Created by: rosieevie
- Created on: 06-04-15 22:35
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- Air Pollution Controls 1
- General Methods
- Legislation - regulations that control polluting activities
- Clean Air Acts (1956) - bans release of excessive smoke (smoke control orders) in urban smokeless zones
- Montreal Protocol (1987) - reduce CFC use
- Kyoto Protocol (1997) - reduce greenhouse gas emissions
- Landfill Tax - taxes waste to encourage recycling and reduce usage
- Reduce use of energy resources and minderals - reduces extraction and refining emissions
- Sulphur Oxides
- Fuel Desulfurisation
- Hydrogen sulphide removed from natural gas
- Sulphur compounds removed from crude oil
- Iron pyrites in coal contain sulphur - removed by crushing, washing and streaming in denser materials
- Flue Gas Desulfurisation
- Dry flue gas scrubbing - react flue gas with crushed calcium carbonate
- Makes gypsum (CaSO4) - building plaster - O2 and CO2
- Wet flue gas scrubbing - bubbled through sodium sulfite solution (Na2SO3)
- Makes sodium hydrogen sulfite (NaHSO3) - heated to reproduce NaHSO3, water and conc. sulphur dioxide = used in industry
- Dry flue gas scrubbing - react flue gas with crushed calcium carbonate
- Fuel Desulfurisation
- Methane
- Reduced landfill use - stops anaerobic decomposition
- Gas collection in fossil fuel extraction - used as a fuel
- General Methods
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