19 research outputs found
Alkyl Bromide Photobromination - Catalysis By Hydrogen Bromide and the Elimination Readdition Pathway
The reaction pathways to aromatic hydrocarbons from conversion of methanol and olefins on H-ZSM-5 zeolite
Élucidation du mécanisme de conversion du méthanol en hydrocarbures sur un nouveau type de zéolithe : apport de la chromatographie en phase gazeuse et de la résonance magnétique nucléaire du carbone-13
Elucidation of the mechanism of conversion of methanol and ethanol to hydrocarbons on a new type of synthetic zeolite
13C nuclear magnetic resonance and vapor-phase chromatography have been used to investigate the conversions of methanol and ethanol to hydrocarbons on a synthetic zeolite of the type H-ZSM-5 as described by Mobil. Methanol is first dehydrated to dimethyl ether and ethylene. Then the reaction proceeds by two competitive paths: first, successive dehydration-methanolation steps to give branched aliphatics, and, second, polycondensation reactions leading to linear aliphatic and aromatic compounds. The basic mechanism is essentially the same for ethanol, with the major difference being that ethylene can also be formed by direct dehydration of ethanol. At variance to earlier proposals, a mechanism involving carbenium ions is proposed which accounts well for the high yield in branched hydrocarbons and the observation of methyl ethyl ether which is detected in the methanol conversion products
Rapport d’activité du projet GALE&T « Garonne et Allier Eaux & Territoires » du programme national « Eaux & Territoires »
Comparative study of transformations of C3H26 and i-C4H8 on zeolites of the pentasil and mordenite type
Contribution de l’analyse multi-temporelle pour la gestion et restauration des cours d’eau : v\ue9g\ue9tation riveraine et r\ue9silience
Contribution de l’analyse multi-temporelle pour la gestion et restauration des cours d’eau : végétation riveraine et résilience (projet GALE&T)
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