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
Fueldesulfurisation
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limestone is reacted with flue gas to produce gypsum used for building plaster, sodium sulphite scrubbing (flue gases are bubbled through sodium sulphite solution) producing sodium hydrogen sulphite
Fluegasdesulfurisation
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less NOx is produced using lower temperatures combustion techniques such as fluidised bed combustion
Lowtemperaturecombustion
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a chamber in the exhaust pipes contain a catalyst such as platinum, which chemically reduces NOx back to nitrogen and oxygen gases
Catalyticconverters
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NOx levels in flue gases can be lowered by chemically reducing them
Ureaspray
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effluent gases containing smoke are passed through a chamber contained electrically charged wires, smoke is attracted to and builds up and falls as fly ash
Electrostatic precipitators
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Effluent gases are forced to rotate in a chamber, suspended solids are thrown to the outside and collected
Cycloneseparators
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A fine water spray is used to wash out suspended solids
Scrubber
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used to increase efficiency of combustion by helping deliver more air tho the combustion chamber
Turbocharger
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less persistent than CFCs, but still deplete the ozone
HCFCs
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a flammale and toxic material that is used to replace CFCs in aerosol propellant
Propane
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material used to neutralise incinerated CFCs dissolved in water
lime
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Other cards in this set
Card 2
Front
limestone is reacted with flue gas to produce gypsum used for building plaster, sodium sulphite scrubbing (flue gases are bubbled through sodium sulphite solution) producing sodium hydrogen sulphite
Back
Fluegasdesulfurisation
Card 3
Front
less NOx is produced using lower temperatures combustion techniques such as fluidised bed combustion
Back
Card 4
Front
a chamber in the exhaust pipes contain a catalyst such as platinum, which chemically reduces NOx back to nitrogen and oxygen gases
Back
Card 5
Front
NOx levels in flue gases can be lowered by chemically reducing them
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