Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
| Autor: | Nouria Fatah, Roger Meléndez, Franck Dumeignil, Benjamin Katryniok, Virginie Belliere-Baca, Sébastien Paul, Patrick Rey |
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| Přispěvatelé: | ENSCL, Université de Lille, CNRS, Centrale Lille, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
glycerol
two-zone fluidized bed reactor 02 engineering and technology 010402 general chemistry Heterogeneous catalysis 7. Clean energy 01 natural sciences Catalysis lcsh:Chemistry chemistry.chemical_compound Glycerol Phosphotungstic acid Original Research Chemistry acrolein Acrolein dehydration [CHIM.CATA]Chemical Sciences/Catalysis General Chemistry Coke 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences heterogeneous catalysis lcsh:QD1-999 Chemical engineering Fluidized bed 0210 nano-technology Selectivity |
| Zdroj: | Frontiers in Chemistry Frontiers in Chemistry, Frontiers Media, 2019, Frontiers in Chemistry, 7, pp.127. ⟨10.3389/fchem.2019.00127⟩ Frontiers in Chemistry, 2019, Frontiers in Chemistry, 7, pp.127. ⟨10.3389/fchem.2019.00127⟩ Frontiers in Chemistry, Vol 7 (2019) |
| ISSN: | 2296-2646 |
| DOI: | 10.3389/fchem.2019.00127 |
| Popis: | International audience; The gas-phase catalytic dehydration of glycerol to acrolein was carried out in a Two-Zone Fluidized-Bed Reactor (TZFBR) using a 20 wt. % phosphotungstic acid (H3PW12O40) catalyst supported on CARIACT-Q10 commercial silica. In the first step, a hydrodynamic study of the reactor was performed. A quality of fluidization of more than 80% was obtained. In the second step, the mechanical stability of the catalyst was studied. It was found that only the external layer of active phase is eliminated under the conditions of operation whereas the global composition of the catalyst was not significantly affected after 44 h of fluidization. Finally, in a third step, the influence of the main operating parameters on the overall catalytic performances (glycerol/oxygen molar ratio and relative volumes of the reaction and regeneration zones) was investigated, showing notably the importance of the O2/glycerol ratio, resulting in an inverse trend between conversion and selectivity. Increasing O2/glycerol ratio led to higher conversion (lower coke deposit as shown by TGA analysis), but to the detriment of the selectivity to acrolein, supposedly due to the presence of O2 in the reaction zone causing the degradation of glycerol and acrolein. |
| Databáze: | OpenAIRE |
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