Ethanol transformation into higher hydrocarbons over HZSM-5 zeolite: Direct detection of radical species by in situ EPR spectroscopy

Karima Ben Tayeb K. (1, 2) , Ludovic Pinard (3) , Nadia Touati (2) , Hervé Vezin (2) , Sylvie Maury (4) , Olivier Delpoux (4)

1 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]
2 LASIRE - Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516
3 Zéolithes
4 IFPEN - IFP Energies nouvelles

HZSM-5 (Si/Al ratio = 40) zeolite is an efficient catalyst for ethanol transformation due to its capacity to maintain a high activity in C3 + hydrocarbons formation with time-on-stream (TOS) and this in spite of a great loss of acidity and microporosity and a high coke content deposited inside the pores of the zeolite. A study by in situ Electron Paramagnetic Resonance (EPR) spectroscopy in ethylene conversion to hydrocarbons showed that a fraction of radicals was active.

Domaines: Catalyse; Chimie organique; Autre

Karima Ben Tayeb K., Ludovic Pinard, Nadia Touati, Hervé Vezin, Sylvie Maury, et al.. Ethanol transformation into higher hydrocarbons over HZSM-5 zeolite: Direct detection of radical species by in situ EPR spectroscopy. Catalysis Communications, 2012, 27, pp.119-123. ⟨10.1016/j.catcom.2012.07.005⟩. ⟨hal-00734388⟩