The IR spectra of adsorbed cyclohexanol and cyclohexylmethanol were us
ed to compare the catalytic properties of Ti-containing pentasils with
that of Ti-silicalite (TS-1) and TiO2 (anatase). While TiO2 had basic
character evidenced by alcohol dehydrogenation, TS-1 possessed also s
ome weak acid sites able to dehydrate the alcohol. The acid properties
were improved by the introduction of aluminum into the Ti-ZSM-5 sampl
es.