Catalytic converter of a car

Catalytic converter of a car

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: A catalytic converter, a device which reduces the toxic emissions from an internal combustion engine by converting the harmful exhaust by-products into relatively harmless ones. Oxidation catalysts convert hydrocarbons to carbon dioxide and water. Three-way catalysts convert oxides of nitrogen back into nitrogen. A 90 percent reduction of pollution emission has been achieved without loss of engine performance or fuel economy. 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, car, catalytic converter, exhaust, pollution, transport industry

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