Unusual isomerization routes of n-butenes on the acidic OH (OD) groups on ferrierite zeolite studied by FT-IR

Abstract

The double bond migration of 1-butene and cis/trans isomerization of 2-butene on deuterated acidic hydroxyl (OD) groups of ferrierite zeolite were observed by IR spectroscopy. Both reactions of irreversibly adsorbed species proceeded below 270 K under evacuation in the absence of H/D isotope exchange reaction of the acidic OD groups. This suggests the different property and catalysis of acidic OH groups on zeolites from those of H + in acidic solutions.