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Article Dans Une Revue Applied Catalysis A : General Année : 2020

Pickering emulsions assisted synthesis of fatty acetal over phenyl sulfonic groups grafted on activated charcoal

Résumé

Activated charcoal Darco® KB-G, was functionalized with phenyl sulfonic groups (Ph-SO3H) by surface modification in acidic aqueous media under mild conditions (25 °C, Patm). The formation of new CeC covalent bonds was confirmed by both TGA and XPS. The functionalized amphiphilic solids were also characterized by nitrogen adsorption-desorption, SEM, IR and Raman spectroscopy. The reference solid Darco-0.50ASFL stabilized dodecyl aldehyde/ethylene glycol by Pickering emulsions and demonstrated both good activity and selectivity in a solvent-free biphasic acetalization. Kinetic studies of the formation of hemiacetal and acetal were investigated by monitoring the progress of the reaction by HPLC. Experimental kinetic profiles of dodecyl aldehyde, hemiacetal and acetal were compared to model kinetic profiles. The recycling of Darco-0.50ASFL was also studied by performing five consecutive catalytic runs without regeneration of the catalyst.
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Dates et versions

hal-02536516 , version 1 (08-04-2020)

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Minrui Xu, Frédéric Richard, Matthieu Corbet, Philippe Marion, Jean-Marc Clacens. Pickering emulsions assisted synthesis of fatty acetal over phenyl sulfonic groups grafted on activated charcoal. Applied Catalysis A : General, 2020, 597, pp.117543. ⟨10.1016/j.apcata.2020.117543⟩. ⟨hal-02536516⟩
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