Fig. 1
From: Observation of an oxonium ion intermediate in ethanol dehydration to ethene on zeolite
13C NMR analysis of the formed surface species on zeolite. 13C CP/MAS NMR spectra of trapped species on H-ZSM-5 obtained from reaction of CH313CH2OH for 4 s at different temperatureof 160 °C–350 °C (a-e). Asterisks denote spinning sidebands
