The Role of Acidity in Terephthalic Acid Synthesis from Renewable Carbon Source
| Autor: | Mihaela Florea, Ştefan Neaţu, Jonathan Counsell, Fabrizio Cavani, Florentina Neaţu, Amelia Elena Bocîrnea, Mihaela M. Trandafir |
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| Přispěvatelé: | Trandafir M.-M., Neatu S., Bocirnea A., Counsell J., Cavani F., Florea M., Neatu F. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Terephthalic acid
Materials science Autoxidation p-cymene oxidation business.industry Organic Chemistry strong acidity terephthalic acid synthesis Mn−Co mixed oxide Catalysis Renewable energy Inorganic Chemistry chemistry.chemical_compound autoxidation chemistry Carbon source Organic chemistry Physical and Theoretical Chemistry business |
| Popis: | In this study, manganese-cobalt (MnCo) mixed oxide catalysts were prepared by two different routes: co-precipitation and citrate method. The structures and properties of the mixed oxide catalysts were investigated by several techniques: nitrogen adsorption-desorption isotherms, X-ray diffraction, X-ray photoelectron spectroscopy, SEM, FTIR and UV-Vis spectroscopies, temperature-programmed reduction with H2 (H2-TPR) and temperature-programmed desorption of NH3 (NH3-TPD). Their catalytic performance was investigated in the liquid-phase selective oxidation of naturally occurred p-cymene to terephthalic acid, as an alternative to p-xylene, a fossil derivative fuel component. Within this study, we demonstrate that the materials prepared by the co-precipitation method present strong acid sites that boost the oxidation rate and allow oxidation of p-cymene up to terephthalic acid. The co-existence of a significant number of strong acid and centers in higher oxidation state (Co3+) are required for these materials to be selective. |
| Databáze: | OpenAIRE |
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