Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst

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

doi:10.1021/ie990614g

Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst

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

Chemical Reactor Engineering

Research output: Contribution to journal › Article › Academic › peer-review

41 Citations (Scopus)

Abstract

The transient kinetics of ethylene oxidn. by O over a com. Pt/Rh/CeO2/g-Al2O3 3-way catalyst were modeled. Expts. were carried out in a fixed-bed microreactor with 2 sep. inlets, enabling alternate feeding of ethylene and O with frequencies ?1/4 Hz. The exptl. conditions resemble the cold-start period of an Otto engine in a car. Two types of adsorbed ethylene species seem to exist. A selective catalyst deactivation for O adsorption, due to deposition of carbonaceous species, was found. A kinetic model was developed, based on elementary reaction steps, that allows one to describe the expts. quant. This model was combined with the published model for transient CO oxidn. over the same catalyst, which enables one to predict the results of simultaneous ethylene and CO oxidn. Both components react in rather distinct zones, with ethylene being converted only when CO oxidn. is almost complete. [on SciFinder (R)]

Original language	English
Pages (from-to)	599-609
Number of pages	11
Journal	Industrial and Engineering Chemistry Research
Volume	39
Issue number	3
DOIs	https://doi.org/10.1021/ie990614g
Publication status	Published - 2000

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title = "Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst",

abstract = "The transient kinetics of ethylene oxidn. by O over a com. Pt/Rh/CeO2/g-Al2O3 3-way catalyst were modeled. Expts. were carried out in a fixed-bed microreactor with 2 sep. inlets, enabling alternate feeding of ethylene and O with frequencies ?1/4 Hz. The exptl. conditions resemble the cold-start period of an Otto engine in a car. Two types of adsorbed ethylene species seem to exist. A selective catalyst deactivation for O adsorption, due to deposition of carbonaceous species, was found. A kinetic model was developed, based on elementary reaction steps, that allows one to describe the expts. quant. This model was combined with the published model for transient CO oxidn. over the same catalyst, which enables one to predict the results of simultaneous ethylene and CO oxidn. Both components react in rather distinct zones, with ethylene being converted only when CO oxidn. is almost complete. [on SciFinder (R)]",

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T1 - Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst

AU - Harmsen, J.M.A.

AU - Hoebink, J.H.B.J.

AU - Schouten, J.C.

PY - 2000

Y1 - 2000

N2 - The transient kinetics of ethylene oxidn. by O over a com. Pt/Rh/CeO2/g-Al2O3 3-way catalyst were modeled. Expts. were carried out in a fixed-bed microreactor with 2 sep. inlets, enabling alternate feeding of ethylene and O with frequencies ?1/4 Hz. The exptl. conditions resemble the cold-start period of an Otto engine in a car. Two types of adsorbed ethylene species seem to exist. A selective catalyst deactivation for O adsorption, due to deposition of carbonaceous species, was found. A kinetic model was developed, based on elementary reaction steps, that allows one to describe the expts. quant. This model was combined with the published model for transient CO oxidn. over the same catalyst, which enables one to predict the results of simultaneous ethylene and CO oxidn. Both components react in rather distinct zones, with ethylene being converted only when CO oxidn. is almost complete. [on SciFinder (R)]

AB - The transient kinetics of ethylene oxidn. by O over a com. Pt/Rh/CeO2/g-Al2O3 3-way catalyst were modeled. Expts. were carried out in a fixed-bed microreactor with 2 sep. inlets, enabling alternate feeding of ethylene and O with frequencies ?1/4 Hz. The exptl. conditions resemble the cold-start period of an Otto engine in a car. Two types of adsorbed ethylene species seem to exist. A selective catalyst deactivation for O adsorption, due to deposition of carbonaceous species, was found. A kinetic model was developed, based on elementary reaction steps, that allows one to describe the expts. quant. This model was combined with the published model for transient CO oxidn. over the same catalyst, which enables one to predict the results of simultaneous ethylene and CO oxidn. Both components react in rather distinct zones, with ethylene being converted only when CO oxidn. is almost complete. [on SciFinder (R)]

U2 - 10.1021/ie990614g

DO - 10.1021/ie990614g

M3 - Article

SN - 0888-5885

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JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

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Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst

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