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GCSE Combined Science · key term
A device in a vehicle's exhaust system that uses catalysts to convert pollutants into less harmful substances.
Used by OCR
Chemistry, Combined Science
Revise: Atmospheric Pollution and Emission ControlA catalytic converter is fitted in a vehicle's exhaust system. Exhaust gases pass over catalysts, such as platinum and rhodium, which speed up reactions without being used up overall.
Catalytic converters chemically change pollutants; they do not simply trap them or make exhaust gases completely harmless.
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