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3. Aftertreatment for spark-ignition engines: three-way catalytic converter
3.1 Key issues and functional analysis
Introduced in the early 1970s in the United States, after-treatment of gasoline vehicles initially concerned emissions of carbon monoxide (CO) and unburned hydrocarbons (HC) harmful to humans. The first catalytic systems took the form of alumina beads impregnated with Pt or Pd. These technologies soon gave way to monolithic reactors, notably under the impetus of the Engelhard company .
The first regulations aimed at reducing NOx emissions in the late 1970s led to a complete overhaul...
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Aftertreatment for spark-ignition engines: three-way catalytic converter
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