Coupled engineering and chemical approach to the design of a catalytic structured reactor for combustion of VOCs : cobalt oxide catalyst on knitted wire gauzes
| Autor: | Jacek Tyczkowski, Joanna Łojewska, Przemysław J. Jodłowski, Szczepan Zapotoczny, Wiktor Redzynia, Marzena Iwaniszyn, Andrzej Kołodziej, Piotr Kuśtrowski |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
model validation
Materials science Order of reaction catalytic combustion General Chemical Engineering Catalytic combustion General Chemistry Chemical vapor deposition Activation energy Combustion Industrial and Manufacturing Engineering Catalysis Chemical engineering Wire gauze Environmental Chemistry structured reactor catalytic wire gauze Cobalt oxide reactor modelling |
| Popis: | A structured reactor was built from stacked catalytic knitted wire gauzes. The cobalt oxide catalyst was deposited on the wire gauze surface using the plasma enhanced metal-organic chemical vapour deposition method. The Raman scattering, electron diffraction and photoelectron emission analyses of the catalyst surface evidenced the formation of a cobalt oxide spinel with crystallites of about 5 nm. The results of kinetic studies of VOC combustion (using n-hexane as a probe molecule) performed in a gradientless reactor allowed determining the reaction order and activation energy for this catalytic reaction. It has been proved that reaction follows first order kinetics. Two reactor models (plug-flow and plug-dispersion) were compared and the simpler plug-flow one is recommended due to the negligible influence of axial dispersion. Experiments were performed in a large laboratory reactor (temperature up to 873 K, gas stream up to 10 m3/h STP) for catalytic conversion of VOCs (n-hexane). The model validation has shown satisfactory accuracy with maximum and average errors of 12% and 4%, respectively. |
| Databáze: | OpenAIRE |
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