Sulfur poisoning mechanism of three way catalytic converter and its grey relational analysis

Abstract

Combining a detailed catalytic surface reaction mechanism with noble metal and promoter elementary reactions, a new three-way catalytic converter (TWC) reaction mechanism is established. Based on the new mechanism, steady condition numerical simulation is carried out, and the change of light-off temperatures and conversion efficiency with various SO₂ contents is obtained. By grey relational analysis (GRA), the relational grade between conversion efficiency and SO₂ content is obtained. And, the result shows that SO₂ content has the most important influence on C₃H₆ and NO_X conversion efficiency. This provides an important reference to the improvement of activity design of TWC, and may provide guidance for the condition design and optimization of TWC.

Keywords

sulfur poisoning / three-way catalytic converter / reaction mechanism / numerical simulation / grey relational analysis

References

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