Catalytic Abatement of Volatile Organic Compounds and Soot over Manganese Oxide Catalysts
| Autor: | Clarissa Cocuzza, Marco Piumetti, Debora Fino, Nunzio Russo, Miguel Jose Marin Figueredo, Samir Bensaid |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Scanning electron microscope sustainable catalysts chemistry.chemical_element 02 engineering and technology 010402 general chemistry medicine.disease_cause 01 natural sciences 7. Clean energy Article Catalysis Propene chemistry.chemical_compound X-ray photoelectron spectroscopy medicine Catalytic oxidation of volatile organic compounds Manganese oxide catalysts Soot catalytic oxidation Sustainable catalysts Molecule General Materials Science Microscopy QC120-168.85 Chemistry QH201-278.5 catalytic oxidation of volatile organic compounds 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) Soot 0104 chemical sciences TK1-9971 soot catalytic oxidation Chemical engineering Descriptive and experimental mechanics manganese oxide catalysts Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology Carbon Powder diffraction |
| Zdroj: | Materials, Vol 14, Iss 4534, p 4534 (2021) Materials Volume 14 Issue 16 |
| ISSN: | 1996-1944 |
| Popis: | A set of manganese oxide catalysts was synthesized via two preparation techniques: solution combustion synthesis (Mn3O4/Mn2O3-SCS and Mn2O3-SCS) and sol-gel synthesis (Mn2O3-SG550 and Mn2O3-SG650). The physicochemical properties of the catalysts were studied by means of N2-physisorption at −196 °C, X-ray powder diffraction, H2 temperature-programmed reduction (H2-TPR), soot-TPR, X-ray photoelectron spectroscopy (XPS) and field-emission scanning electron microscopy (FESEM). The high catalytic performance of the catalysts was verified in the oxidation of Volatile Organic Compounds (VOC) probe molecules (ethene and propene) and carbon soot in a temperature-programmed oxidation setup. The best catalytic performances in soot abatement were observed for the Mn2O3-SG550 and the Mn3O4/Mn2O3-SCS catalysts. The catalytic activity in VOC total oxidation was effectively correlated to the enhanced low-temperature reducibility of the catalysts and the abundant surface Oα-species. Likewise, low-temperature oxidation of soot in tight contact occurred over the Mn2O3-SG550 catalyst and was attributed to high amounts of surface Oα-species and better surface reducibility. For the soot oxidation in loose contact, the improved catalytic performance of the Mn3O4/Mn2O3-SCS catalyst was attributed to the beneficial effects of both the morphological structure that—like a filter—enhanced the capture of soot particles and to a probable high amount of surface acid-sites, which is characteristic of Mn3O4 catalysts. |
| Databáze: | OpenAIRE |
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