V or Mn zeolite catalysts for the oxidative desulfurization of diesel fractions using dibenzothiophene as a probe molecule: Preliminary study
| Autor: | Sibele B. C. Pergher, Mariele I. S. de Mello, E. V. Sobrinho, Victor Teixeira da Silva |
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| Rok vydání: | 2020 |
| Předmět: |
010405 organic chemistry
Process Chemistry and Technology Vanadium chemistry.chemical_element Manganese 010402 general chemistry 01 natural sciences Catalysis Mordenite 0104 chemical sciences Flue-gas desulfurization Diesel fuel chemistry.chemical_compound chemistry Dibenzothiophene Physical and Theoretical Chemistry Zeolite Nuclear chemistry |
| Zdroj: | Molecular Catalysis. 482:100495 |
| ISSN: | 2468-8231 |
| Popis: | With growing concern about the environment, the oil industry has become interested in new technologies that reduce costs by increasing the efficiency of removing sulfur compounds from fossil fuels. Oxidative desulfurization is an interesting sulfur-removal process for the petroleum industry because it uses mild reaction conditions. In this work, zeolites (ZSM-5, NaX, NaY, Beta and Mordenite) impregnated with 1% vanadium or manganese were used for the oxidation and extraction of dibenzothiophene (DBT) from a diesel load. The catalysts were characterized by X-ray diffraction, N2 adsorption-desorption textural analysis and scanning electron microscopy, and the reaction products were analyzed by gas chromatography (GC-FID). It was found that vanadium or manganese impregnation did not significantly modify the structure of the zeolites. The vanadium-impregnated zeolite ZSM-5 showed the best result in the oxidation of dibenzothiophene, oxidizing up to 80% of the DBT added in the diesel charge (ZSM-5 5020 V). The manganese-based catalysts were not as active for this oxidation, and the best performance was found for the removal of DBT by extraction. |
| Databáze: | OpenAIRE |
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