Wet peroxide oxidation of phenol over Cu-ZSM-5 catalyst in a flow reactor. Kinetics and diffusion study
| Autor: | Andrey N Zagoruiko, Valentin N. Parmon, Vladislav V. Goncharuk, Artemiy B. Ayusheev, R. V. Prihod’ko, Svetlana A. Yashnik, Oxana P. Taran, Zinfer R. Ismagilov |
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| Rok vydání: | 2015 |
| Předmět: |
geography
geography.geographical_feature_category General Chemical Engineering Diffusion Kinetics Inorganic chemistry General Chemistry Peroxide Industrial and Manufacturing Engineering Catalysis Volumetric flow rate chemistry.chemical_compound chemistry Environmental Chemistry Phenol Monolith ZSM-5 |
| Zdroj: | Chemical Engineering Journal. 282:108-115 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2015.02.064 |
| Popis: | The wet peroxide oxidation of phenol over the extruded 1.5%Cu/(80%H-ZSM-5 + 20%Al 2 O 3 ) catalysts of the different geometric forms and sizes (cylinders with diameters 1, 2, 3 mm, trefoils, spheres and monoliths with size of channels 1.0 × 1.0, 1.5 × 1.5 mm) was studied in a flow reactor. The geometric form and size of the catalyst granules exert a pronounced effect on the apparent kinetics of the process. The highest efficiency toward phenol destruction was observed for the catalysts with a greater geometric surface area (trefoils and monolith with high channel density). The conversions of phenol and TOC at flow rate 5 mL min −1 equal to 100 and ∼90% were achieved over these catalysts. Application of the spherical shape catalyst with lowest geometric surface gave only 80% conversion of phenol at the same reaction conditions. The proposed mathematical model of the process, accounting for internal and external diffusion limitations on the base of the pseudo-first order simplification of the apparent kinetic rates, provide reasonably accurate description of the experimental data and reproducing all important process regularities. |
| Databáze: | OpenAIRE |
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