Stability of carbon-supported iron catalysts for catalytic wet peroxide oxidation of ionic liquids
| Autor: | Angel F. Mohedano, Juan J. Rodriguez, Iván Moreno-Andrade, Ismael F. Mena, Elena Diaz |
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| Rok vydání: | 2018 |
| Předmět: |
Process Chemistry and Technology
02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Pollution Peroxide Catalysis chemistry.chemical_compound Hydrothermal carbonization chemistry Ionic liquid Chemical Engineering (miscellaneous) Leaching (metallurgy) 0210 nano-technology Porosity Waste Management and Disposal Sludge Incipient wetness impregnation 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering. 6:6444-6450 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2018.09.061 |
| Popis: | The stability of two carbon-supported Fe catalysts in the catalytic wet peroxide oxidation (CWPO) of 1-Butyl-3-methylimidazolium acetate (BmimAc) was examined. One catalyst (Fe/AS) was obtained by chemical activation of dried sewage sludge with iron chloride at a FeCl3:sewage sludge mass ratio of 3 and the other (Fe/HTCS) by hydrothermal carbonization of the sludge in the presence of FeCl3 at a mass ratio of also 3. Fe/AS catalyst exhibited a well-developed porosity, whereas Fe/HTCS one did not show porosity. The carbon content was high in both catalysts, with a total Fe content of 5.2 and 6.6% (w/w) for Fe/AS and Fe/HTCS catalysts, respectively. An aditional Fe catalyst prepared by incipient wetness impregnation on a commercial active carbon support (Fe/AC) was used for comparison with the previous two. All catalysts were active in experiments of H2O2 decomposition and long-term CWPO runs (0.133 kgFe h molBmimAc–1 at 80 °C). Whereas Fe/AC catalyst lost activity largely due to Fe leaching (90% of FeBulk), Fe/AS and Fe/HTCS catalysts exhibited virtually no Fe leaching and hence fairly good stability. Fe/AS catalyst, which afforded complete removal of Bmim+ and TOC conversion values around 30%, proved the most efficient catalyst. |
| Databáze: | OpenAIRE |
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