Intramolecular H/D Exchange of Ethanol Catalyzed by Acidic OH Groups on H‑ZSM‑5 Zeolite

Abstract

IR observation of ethanol adsorption clarified the presence of the apparent intramolecular isotope exchange from CD₃CH₂OH to CHD₂CH₂OD on acidic OH groups of H-ZSM-5 zeolite. This reaction did not proceed with CD₃OH nor CH₃CD₂OH, implying that the β-hydrogen of alcohol had interaction with the lattice oxygen adjacent to Al and that the reaction was mediated by isotope exchange of CD₃ groups of ethanol and OH groups on zeolite