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Catalytic converter from car exhaust

Catalytic converter from car exhaust

A506/0024

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Credit

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

Caption

View through the element of 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. 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.

Release details

Model release not required. Property release not required.

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