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Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor

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 (H(3)PW(12)O(40)) catalyst supported on CARIACT-Q10 commercial silica. In the first step, a hydrodynamic study of the reactor was performed. A...

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Autores principales: Katryniok, Benjamin, Meléndez, Roger, Bellière-Baca, Virginie, Rey, Patrick, Dumeignil, Franck, Fatah, Nouria, Paul, Sébastien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6426793/
https://www.ncbi.nlm.nih.gov/pubmed/30923707
http://dx.doi.org/10.3389/fchem.2019.00127
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author Katryniok, Benjamin
Meléndez, Roger
Bellière-Baca, Virginie
Rey, Patrick
Dumeignil, Franck
Fatah, Nouria
Paul, Sébastien
author_facet Katryniok, Benjamin
Meléndez, Roger
Bellière-Baca, Virginie
Rey, Patrick
Dumeignil, Franck
Fatah, Nouria
Paul, Sébastien
author_sort Katryniok, Benjamin
collection PubMed
description 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 (H(3)PW(12)O(40)) 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 O(2)/glycerol ratio, resulting in an inverse trend between conversion and selectivity. Increasing O(2)/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 O(2) in the reaction zone causing the degradation of glycerol and acrolein.
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spelling pubmed-64267932019-03-28 Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor Katryniok, Benjamin Meléndez, Roger Bellière-Baca, Virginie Rey, Patrick Dumeignil, Franck Fatah, Nouria Paul, Sébastien Front Chem Chemistry 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 (H(3)PW(12)O(40)) 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 O(2)/glycerol ratio, resulting in an inverse trend between conversion and selectivity. Increasing O(2)/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 O(2) in the reaction zone causing the degradation of glycerol and acrolein. Frontiers Media S.A. 2019-03-14 /pmc/articles/PMC6426793/ /pubmed/30923707 http://dx.doi.org/10.3389/fchem.2019.00127 Text en Copyright © 2019 Katryniok, Meléndez, Bellière-Baca, Rey, Dumeignil, Fatah and Paul. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Katryniok, Benjamin
Meléndez, Roger
Bellière-Baca, Virginie
Rey, Patrick
Dumeignil, Franck
Fatah, Nouria
Paul, Sébastien
Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title_full Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title_fullStr Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title_full_unstemmed Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title_short Catalytic Dehydration of Glycerol to Acrolein in a Two-Zone Fluidized Bed Reactor
title_sort catalytic dehydration of glycerol to acrolein in a two-zone fluidized bed reactor
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6426793/
https://www.ncbi.nlm.nih.gov/pubmed/30923707
http://dx.doi.org/10.3389/fchem.2019.00127
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