The influence of adamantane on the reaction of n -heptane over H-Y, H-β and H-mordenite zeolites

The effect of adamantane (Ad) on the activity and selectivity of acidic zeolites Y, β and mordenite (M) in the isomerization and cracking ofn-heptane (C₇) in He at 443 K was studied.Ad was found to promote the isomerization of C₇. TheAd uptake of the zeolites, and the IR spectra obtained from the zeolite-boundAd were determined. It was found thatAd did not remain completely unconverted under the conditions of the C₇ reaction. The activity of the catalysts in the conversion ofAd increased in the sequence of H-YAd, responsible for the cocatalytic effect, can participate in hydride transfer processes and remain unconverted, while another fraction, depending on catalyst acidity, is converted to dimer and oligomers.