Spatio-temporal dynamics of oxygen storage and release in a three-way catalytic converter

Pankaj Kumar, Tian Gu, Karolos Grigoriadis, Matthew Franchek, Vemuri Balakotaiah

    Research output: Contribution to journalArticlepeer-review

    37 Scopus citations

    Abstract

    A physics based one-dimensional transient seven partial differential equation model is proposed to study the oxygen storage dynamics and cold start behavior of a three-way catalytic converter. The model uses the recently published simplified kinetic model, is computationally efficient and may be used for offline TWC outer loop controller design and validation. The proposed TWC model is validated using emissions data collected in a vehicle over multiple drive cycles including FTP cycles. The internal mass transfer approximation is confirmed by comparing with a detailed washcoat diffusion-reaction model and is observed to be consistent for all practical purposes. The results are also used to study the qualitative and quantitative errors in emission and oxygen storage predictions caused by axially averaging thus identifying the region of applicability of the simpler axially averaged seven ordinary differential equation model.

    Original languageEnglish (US)
    Pages (from-to)180-190
    Number of pages11
    JournalChemical Engineering Science
    Volume111
    DOIs
    StatePublished - May 24 2014

    Keywords

    • Catalysis
    • Chemical reactor
    • Model reduction
    • Oxygen storage
    • Three-way converter

    ASJC Scopus subject areas

    • General Chemical Engineering
    • General Chemistry
    • Applied Mathematics
    • Industrial and Manufacturing Engineering

    Fingerprint

    Dive into the research topics of 'Spatio-temporal dynamics of oxygen storage and release in a three-way catalytic converter'. Together they form a unique fingerprint.

    Cite this