Transient Kinetic Modeling of the Ethylene and Carbon Monoxide Oxidation over a Commercial Automotive Exhaust Gas Catalyst
| Autor: | Jhbj Jozef Hoebink, JC Jaap Schouten, Jma Jan Harmsen |
|---|---|
| Přispěvatelé: | Chemical Reactor Engineering |
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Ethylene Chemistry General Chemical Engineering Inorganic chemistry chemistry.chemical_element Exhaust gas General Chemistry Oxygen Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound Hydrocarbon Elementary reaction Platinum Carbon monoxide |
| Zdroj: | Industrial and Engineering Chemistry Research, 39(3), 599-609. American Chemical Society |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie990614g |
| Popis: | The transient kinetics of ethylene oxidation by oxygen over a commercial Pt/Rh/CeO2/γ-Al2O3 three-way catalyst were modeled. Experiments were carried out in a fixed-bed microreactor with two separate inlets, enabling alternate feeding of ethylene and oxygen with frequencies up to 1/4 Hz. The experimental 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 oxygen 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 experiments quantitatively. Furthermore, this model was combined with the published model for transient carbon monoxide oxidation over the same catalyst,1 which enables one to predict the results of simultaneous ethylene and carbon monoxide oxidation. Both components react in rather distinct zones, with ethylene being converted only when carbon monoxide oxidation is almost comp... |
| Databáze: | OpenAIRE |
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