Aftertreatment for spark-ignition engines: three-way catalytic converter
Post-treatment of polluting emmissions from internal combustion thermal engines - Positive-ignition engines

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Aftertreatment for spark-ignition engines: three-way catalytic converter
Post-treatment of polluting emmissions from internal combustion thermal engines - Positive-ignition engines

Authors : Alain SASSI, Emmanuel ROHART, Gérard BELOT

Review date: June 1, 2019 | Lire en français

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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 ...

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