Catalytic converter from car exhaust

Catalytic converter from car exhaust

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Caption: View through the element of a catalytic converter, a device which reduces the toxic emissions from an internal combustion engine by converting the harm- ful exhaust by-products into relatively harmless ones. The inner surface is coated with an alloy containing platinum, rhodium and palladium. Oxidation catalysts convert hydrocarbons to carbon dioxide and water. Three-way catalysts convert oxides of nitrogen back into nitrogen. The addition of a catalytic converter to a car necessitates the use of unleaded fuel since the lead compounds added to regular petrol as anti- knocking agents can 'poison' the catalyst.

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Keywords: air pollution, catalysis, catalyst, catalytic converte, catalytic converter, chemical, chemistry, motorcar, pollution, smog

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