BROENSTED ACIDITY IN ZEOLITES

Theoretical and experimental investigations of intrinsic and enhanced Broensted acidity i) show no evidence for a significant effect on intr insic acidity arising from neutralisation of some of the acid sites, i i) suggest a suitable scale for protic acidity using CO as a probe, ii i) provide a fundamental functional linearity for the correlation of s hift in hydroxyl frequency and changes in band intensity, iv) allow de construction of complex infrared spectra of zeolite OH region, and v) demonstrate the basis for generating Broensted sites of enhanced acidi ty by interaction of Lewis sites with proximate Broensted sites in zeo lites.