Étude de la formation d'acroléine par déshydratation catalytique en phase gazeuse du glycérol issu de végétaux : mécanisme réactionnel et modélisation de la désactivation du catalyseur

Abstract : Glycerol dehydration to form acrolein in gas phase over a solid acid catalyst was studied to understand by-products formation, to determine a detailed mechanism and to explain the deactivation process. Experiments were run in an isothermal fixed bed reactor under different operating conditions. To understand the multiple pathways of the glycerol dehydration mechanism, many by-products of the reaction were passed separately over the catalyst. An original multivalve on-line gas chromatography was used to analyze the whole reaction products continuously and simultaneously. Two products were quantified by high performance liquid chromatography, and the unknown products were identified by gas chromatography-mass spectrometry. A detailed reaction mechanism was then proposed. In order to understand the deactivation process, compounds responsible of carbon deposit were identified and the glycerol conversion fall during an experiment was modelled
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Isabelle Martinuzzi. Étude de la formation d'acroléine par déshydratation catalytique en phase gazeuse du glycérol issu de végétaux : mécanisme réactionnel et modélisation de la désactivation du catalyseur. Alimentation et Nutrition. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0028⟩. ⟨tel-01750685⟩

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