Transient kinetics of ethylene and carbon monoxide oxidation for automotive exhaust gas catalysis: experiments and modelling

J.M.A. Harmsen, J.H.B.J. Hoebink, J.C. Schouten

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Abstract

The transient oxidn. of ethylene by oxygen over a com. available Pt/Rh/CeO2/g-Al2O3 three-way exhaust gas catalyst is described. Expts. were carried out in a fixed-bed micro-reactor with two sep. inlets, enabling alternate feeding of ethylene and oxygen. The exptl. conditions were chosen so as to obtain intrinsic kinetics, i.e., in the absence of external and internal mass and heat transport limitations. Also, these conditions resemble the cold-start period of an Otto engine in a car. For these conditions, only total oxidn. of ethylene to carbon dioxide and steam was obsd. From the shape of the CO2 peaks, two types of adsorbed ethylene species seem to exist. The presence of ceria in the catalyst did not influence the ethylene oxidn. significantly at the investigated conditions. A kinetic model, based on elementary reaction steps, is presented, which can be combined with the model for transient carbon monoxide oxidn. on the same catalyst.
Original languageEnglish
Title of host publicationReaction Kinetics and the Development of Catalytic Processes, Proceedings of the International Symposium, Brugge Belgium
EditorsG.F. Froment, K.C. Waugh
Place of PublicationAmsterdam
PublisherElsevier
Pages101-108
ISBN (Print)9780444500731
DOIs
Publication statusPublished - 1999
Eventconference; International Symposium "Reaction Kinetics and the Development of Catalytic Processes" ; (Brugge) : 1999.04.19-21; 1999-04-19; 1999-04-21 -
Duration: 19 Apr 199921 Apr 1999

Publication series

NameStudies in Surface Science and Catalysis
Volume122
ISSN (Print)0167-2991

Conference

Conferenceconference; International Symposium "Reaction Kinetics and the Development of Catalytic Processes" ; (Brugge) : 1999.04.19-21; 1999-04-19; 1999-04-21
Period19/04/9921/04/99
OtherInternational Symposium "Reaction Kinetics and the Development of Catalytic Processes" ; (Brugge) : 1999.04.19-21

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    Harmsen, J. M. A., Hoebink, J. H. B. J., & Schouten, J. C. (1999). Transient kinetics of ethylene and carbon monoxide oxidation for automotive exhaust gas catalysis: experiments and modelling. In G. F. Froment, & K. C. Waugh (Eds.), Reaction Kinetics and the Development of Catalytic Processes, Proceedings of the International Symposium, Brugge Belgium (pp. 101-108). (Studies in Surface Science and Catalysis; Vol. 122). Elsevier. https://doi.org/10.1016/S0167-2991(99)80137-2