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CHEE 323

28.1

Automobile Emission Control

Government regulations require that automobile manufacturers control the amount of carbon monoxide, hydrocarbons, and nitric oxide in the exhaust of vehicles.

Unburnt hydrocarbons from crevices and/or “cold” walls

NO from atmospheric N2 reaction with O at high temp

CO from incomplete combustion at fuel rich conditions

These issues are not as much fuel quality related, as inherent difficulties in combustion engine design.

“end-of-pipe” treatment is currently the best solution

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