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Transformation de composés modèles soufrés et oléfiniques représentatifs d'une essence de FCC. Approche expérimentale et théorique

Abstract : A preferred route to reduce the sulfur content on the commercial gasoline is the selective hydrodesulfurization (HDS) process of FCC gasoline. A typical gasoline is composed by a mixture of sulfur (1000 ppm) and olefins (20-40%wt) compounds. Therefore, it is important to understand their transformation in order to improve the HDS and minimizing the olefin hydrogenation (HYD). Consequently, the transformation of various sulfur (2-methylthiophene, 3-methylthiophene and benzothiophene) and olefins (hex-1-ene, 4-methylpent-1-ene, 3,3-dimethylbut-1-ene and 2,3-dimethylbut-2-ene) has been studied under HDS operating conditions.By experimental and theoretical (kinetic modeling) approaches, a reactivity scale has been established between the sulfur compounds on one hand and olefins compounds on the other hand. The benzothiophene is the most reactive compound. However it is the most inhibitor compound for the transformation of others sulfur compounds. Regarding the olefins, the hex-1-ene is the most reactive compound among the others branched compounds. A mutual inhibition has been observed when those compounds are studied in mixture according with their structures. These effects result from competitive adsorption between the molecules on the catalyst surface. These results could be modeled and quantified (adsorption and kinetic constants) from a unique model considering the Langmuir-Hinshelwood formalism.
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Submitted on : Monday, January 14, 2019 - 4:18:13 PM
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  • HAL Id : tel-01980754, version 1

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Alan Silva Dos Santos. Transformation de composés modèles soufrés et oléfiniques représentatifs d'une essence de FCC. Approche expérimentale et théorique. Autre. Université de Poitiers, 2017. Français. ⟨NNT : 2017POIT2276⟩. ⟨tel-01980754⟩

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